Lenovo ThinkPad 370 Hardware Maintenance Manual
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- Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 1
IBM Mobile Systems S82G-1502-03 Hardware Maintenance Manual Volume 2: ThinkPad Computers April 1995 We Want Your Comments! (Please see page 491) This Manual Supports: ThinkPad 340x (2610) ThinkPad 355x (2619) ThinkPad 360x (2620) ThinkPad 370x (9545) ThinkPad 700x (9552) ThinkPad 701x (2630) - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 2
- Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 3
IBM Mobile Systems S82G-1502-03 Hardware Maintenance Manual Volume 2: ThinkPad Computers April 1995 We Want Your Comments! (Please see page 491) IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 4
Note Before using this information and the product it supports, be sure to read the general information under " . This publication was developed for products and services offered in the United States of America. IBM may not offer the products, services, or features discussed in this document in other - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 5
number listing. Important This manual is intended for trained servicers who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing an IBM mobile product, be sure to review the safety information under - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 6
are available through IBM or your IBM Authorized Dealer. Publication Mobile Systems HMM Volume 1: Laptop, Notebook, Portable, and Thinkpad Computers ThinkPad 700 (9552) HMS ThinkPad 700 (9552) HMR ThinkPad 700C (9552) HMS ThinkPad 700C (9552) HMR ThinkPad 720/720C (9552) HMS ThinkPad 720/720C (9552 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 7
Publications This manual obsoletes the following publication: Publication Mobile Systems HMM Volume 2: ThinkPad Computers Part, Form Number 82G1502, S82G1502 19H1080, S82G1502 Related Diskettes The following diskettes are available through IBM or your IBM Authorized Dealer. Diskette ThinkPad 300 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 8
vi IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 9
Chart 20 ThinkPad 340x (IBM 2610 23 General Checkout 25 Symptom-to-FRU Index 34 Related Service Procedures 43 Guide 127 Symptom-to-FRU Index 141 Related Service Procedures 154 Product Overview 159 FRU Removals and Replacements 161 Locations 181 Parts Listing 190 ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 10
381 Parts Listing 383 ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 391 General Checkout 393 Symptom-to-FRU Index 408 Related Service Procedures 420 Product Overview 491 Do You Need Technical References 492 Problem Determination Tips 493 Phone Numbers, U.S. and Canada 494 Notices 497 viii - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 11
Diskette Compatibility Matrix 4 Important Service Information 5 How to Use Error Messages 6 How to Read POST Error Messages 6 Safety Notices (Multi-lingual Translations) . . . . . 7 Safety Information 14 General Safety 14 Electrical Safety 15 Safety Inspection Guide 16 Handling Electrostatic - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 12
2618-NOA 2618-POA ThinkPad 355 2619 ThinkPad 355C 2619 2619 ThinkPad 355Cs 2619 2619 ThinkPad 360 2620 2620 ThinkPad 360C 2620 2620 ThinkPad 360Cs 2620 2620 ThinkPad 360Ce 2620 2620 2620 ThinkPad 360Cse 2620 2620 2620 ThinkPad 360P 2620 2620 ThinkPad 370C 9545 9545 9545 ThinkPad 500 2603-081 2603 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 13
710T 2523-09Y 2523-302 2523-303 ThinkPad 720 9552-307 9552-308 ThinkPad 720C 9552-30J ThinkPad 730T 2524 2524 ThinkPad 750 9545-006 9545-008 ThinkPad 750C 9545-306 9545-308 ThinkPad 750Ce 9545 ThinkPad 750Cs 9545 9545 ThinkPad 750P 9545-40C 9545-40E ThinkPad 755C 9545 9545 9545 9545 9545 9545 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 14
Compatible 1.2MB Drive Read/Write Read/Write Note: A 360KB diskette written to or formatted on a 1.2MB drive can be read reliably only on a 1.2MB drive. 4 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 15
or installing any diskette fixes. Customers in Canada should call IBM HelpPC at 800-565-3344 for assistance or down-load manual. Use the following strategy to prevent unnecessary FRU replacement and service expense: If you are instructed to replace a FRU and that does not correct the problem - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 16
to test only IBM products. Non-IBM products or modified options can give false errors and invalid responses. Hard Disk Drive Replacement Strategy: Always try to run a low-level format before replacing a hard disk drive. Warning: The drive startup sequence in the computer you are servicing might have - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 17
, Italian, and Spanish languages. Safety Notice 1 Before the computer is powered-on after FRU replacement, make sure all screws, springs, or other pièces sont bien en place et bien fixées. Pour ce faire, secouez l'unité et assurez-vous qu'aucun bruit suspect ne se produit. Des pièces métalliques - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 18
utiliser que les modèles cités dans la liste de pièces détachées adéquate. Une batterie ou une pile inappropriée risque de prendre feu ou d'exploser. IBM Kundendienst ausgetauscht werden. Sie darf nicht zerlegt, wiederaufgeladen, kurzgeschlossen, oder Feuer oder Wasser ausgesetzt werden. Die Batterie - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 19
au rebut, conformez-vous à la réglementation en vigueur. Lorsque vous remplacez la batterie, veillez à n'utiliser que les modèles cités dans la liste de pièces détachées adéquate. En effet, une batterie inappropriée risque de prendre feu ou d'exploser. Akkus enthalten geringe Mengen von Nickel - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 20
werden. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Batterie nur Batterien des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher de sus celdas al agua. Deséchela tal como dispone la normativa local. 10 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 21
Safety Notice 5 If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your hands, immediately wash the affected areas with water for at least 15 minutes. Seek medical care if any symptoms from the fluid are present after washing. Si le panneau d'affichage à cristaux liquides - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 22
um brennbare Materialien zu entzünden oder Verletzungen bei Personen hervorzurufen. Sebbene le batterie di alimentazione siano a basso voltaggio, una batteria in corto circuito o a massa suficiente como para quemar material combustible o provocar quemaduras en el personal. 12 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 23
Safety Notice 8 Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, then disconnect any interconnecting cables. Avant de retirer une unité remplaçable en clientèle, mettez le système hors tension, débranchez tous les - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 24
Safety Information The following section contains the safety information that you need to be familiar with before servicing an IBM mobile computer. General Safety Follow these rules to ensure general safety: Observe good housekeeping in the area of the machines during and after maintenance. When - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 25
power before: - Performing a mechanical inspection - Working near power supplies - Removing or installing main units Before you start to work on the machine, unplug the power when you work with very high voltages; these instructions are in the safety sections of maintenance information. Use - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 26
inspection guide. If any unsafe conditions are present, you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem. Consider these conditions and the safety hazards they present: Electrical hazards, especially primary power (primary - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 27
the safety of any non-IBM alterations. 6. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage. 7. Check for worn, frayed, or pinched cables. 8. Check that the power-supply cover fasteners (screws or - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 28
is especially useful when handling ESD-sensitive devices. Select a grounding system, such as those listed below, to provide protection that meets the specific service requirement. Note: The use of a grounding system is desirable but not required to protect against ESD damage. - Attach the ESD ground - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 29
Laser Compliance Statement The CD-ROM drive in the ThinkPad computer is a laser product. The CD-ROM drive's is certified in the U.S. to conform to the requirements of the Department of Health and Human Services 21 Code of Federal Regulations (DHHS 21 CFR) Subchapter J for Class 1 laser products. - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 30
Size Chart Use the chart below to match the size and shape of the screws used in the computer you are servicing. A Silver B Black C Silver D Brass E Black F Black G Black H Brass J Silver K Brass L Silver M Silver N Silver P Black Q Brass 20 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 31
Size Chart (continued): Use the chart below to match the size and shape of the screws used in the computer you are servicing. R Brass S Black T Brass U Black V Brass W Black X Black Y Brass Z Brass AA Black BB Brass CC Brass DD Black EE Black FF Silver Introduction - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 32
Screw Size Chart (continued): Use the chart below to match the size and shape of the screws used in the computer you are servicing. GG Silver HH Brass JJ Silver KK Black LL Brass MM Brass NN Silver PP Brass QQ Brass RR Brass SS Brass TT Black UU - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 33
Symptoms 39 Keyboard/TrackPoint II or III Related Symptoms . 40 Indicator Related Symptoms 40 Power Related Symptoms 40 Function/Audio Related Symptoms 41 Peripheral Device Related Symptoms 42 Other Symptoms 42 Intermittent Problems 42 Undetermined Problems 42 Related Service Procedures 43 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 34
Indicator Card 61 Parts Listing 62 Option Parts List 65 24 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 35
procedure as a guide for computer problems. The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype cards go to the page shown in the "Go to" column. Symptom Power failure. (The power indicator does not go on or stay on.) POST does not ThinkPad 340x (IBM 2610) 25 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 36
problems. Note: Make sure that the memory card is fully installed into the connector. Loose connections can cause errors. 1. Power ; then power-on the Power-off the computer and reinstall the IC DRAM card; then power the charged battery pack in Service Diskette into drive A and power-on the computer. 3. - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 37
the problem. Do not replace a non-defective FRU. Reseat the three cables. Replace the keyboard. Replace the system board. The following auxiliary input devices are supported for this computer. Numeric keypad Mouse (PS/2 compatible) External keyboard (with keyboard/mouse cable) ThinkPad 340x (IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 38
powered on or while the system is running, or re-adjustment is required because the temperature has exceeded its normal operating range. This symptom does not indicate a hardware problem. No service problem. Do not replace a non-defective FRU. Reseat the three keyboard cables. Replace the keyboard. - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 39
pack. 2. Connect the AC Adapter and check that power is supplied. 3. Disconnect the AC Adapter and install the charged battery pack; then check that power is supplied by battery pack. If you suspect a power problem, see the appropriate power supply check listed below. "Checking the AC Adapter - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 40
correct, replace the system board. If the problem is not corrected, go to "Undetermined Problems" on page 42. If the voltage is not Battery Pack 1. Power-off the computer. 2. Remove the battery pack and measure the voltage between battery terminals 1 (+) and 4 (−). See the following figure. 30 IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 41
, the charging circuit is working correctly, replace the battery pack. Checking the Backup Battery 1. Power-off the computer and unplug the AC Adapter from the computer. 2. Remove the backup battery. 3. Measure the voltage of the backup battery. See the following figure. ThinkPad 340x (IBM 2610) 31 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 42
1. Power-off the computer and unplug the AC Adapter from the computer. 2. Remove the standby battery. 3. Measure the voltage of the standby battery. verify standby battery operation. If the voltage is less than 3.5 V dc, go to the next step. 4. Plug the AC Adapter into the computer and power-on the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 43
consumption and prolong battery power. For the details of the two modes, see the latest volume of the Hardware Maintenance Manual for ThinkPad computers. Standby Mode: When in standby mode, the following occurs: The LCD backlight turns off. The hard disk motor stops. ThinkPad 340x (IBM 2610) 33 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 44
can be used to help you decide which FRUs to have available when servicing the computer.) The most likely cause is listed first. Perform the FRU Problems" on page 42. Note: For IBM devices not supported by diagnostic codes for the Model 340 and 340CSE, see the manual for that device. 34 IBM Mobile - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 45
1. Go to "Checking the Backup Battery" on page 31. 2. Backup Battery 3. System Board 163 (Time and then set time and date. 2. Backup Battery 3. System Board 174 (Perform "Checking the 190 (A depleted battery pack was installed when the power was on.) 1. Go to "Checking the Battery Pack" on - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 46
Board 1. System Board 1. PCMCIA Slot Assembly 2. PCMCIA Device 3. System Board 1. External Mouse 2. External Keyboard 3. System Board 1. Reseat the keyboard TrackPoint II or III cable. (See "1080 Keyboard Unit" on page 54.) 2. Keyboard 3. External Mouse 4. System Board 36 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 47
Action System Board Memory (See "Memory Checkout" on page 26.) Reserved External Keyboard External Mouse LCD Assembly External CRT 1. Reseat the Diskette Drive 2. Diskette Drive 1. problem remains after replacement of the FRUs, go to "Undetermined Problems" on page 42. ThinkPad 340x (IBM 2610) 37 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 48
followed by four short beeps each time the power switch is operated. (System cannot power-on due to low battery voltage.) One long and one short beep power-on indicator not on, and a blank LCD during POST. 1. Go to "Power Systems Checkout" on page 29. 2. System Board 3. Power Sources No beep, power - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 49
In certain brightness/contrast settings, screen flicker can be seen because of technical limitations. No beep, power-on indicator on, and a blank LCD during POST. 1. System Board LCD backlight not working from the immediate, surrounding area or appear as a "stain". ThinkPad 340x (IBM 2610) 39 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 50
on page 28. 2. Keyboard 3. System Board Pointer Power Systems Checkout" on page 29. 2. Battery Pack 3. Remove the battery pack and let it cool for two hours. 4. Power Sources The system will not power-off. (See "Reset Pushbutton" on page 46.) 1. Press the Reset pushbutton. 2. System Board 40 IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 51
by opening or closing the keyboard. 1. Go to "Suspend Battery Pack" on page 30 and see the note. Modem problems. (If installed) 1. Run the Internal Modem Test. 2. Check that the port is set to enable in Easy Setup. 3. Check that the port power Problems" on page 42. ThinkPad 340x (IBM 2610) 41 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 52
to verify that no more errors exist. Undetermined Problems You are here because the diagnostic tests did supported by the computer. Verify that the power supply being used at the time of the failure is operating correctly. (See "Power Systems Checkout" on page 29.) 1. Power-off the computer. 42 IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 53
, and other external devices d. Battery pack e. IC DRAM card f. PC cards Note: Remember that removing the hard disk drive, an IC DRAM card, or any adapter or device, might cause configuration errors. Ignore error code 174. 4. Power-on the computer. 5. Determine if the problem has changed. 6. If the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 54
. Note: When the temperature drops to the acceptable range, charging will start. The battery in not installed. Diskette drive is in-use Hard disk drive in-use Keyboard is in Num Lock mode Green Green Keyboard is in Caps Lock mode Keyboard is in Scroll Lock mode 44 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 55
works the same as selecting the OK icon to reply OK. 1. Press and hold the F1 key; then power-on the computer. Hold the F1 key down until the Easy-setup screen appears. 2. Select Test and icon or press Esc. The error log is not saved when system power is powered-off. ThinkPad 340x (IBM 2610) 45 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 56
If the problem remains, ThinkPad 750Ce hardware maintenance diskette into diskette drive A and power-on the computer. Note: You can use this maintenance diskette for the Model 340CSE. 3. Select Format the hard disk from the main menu. 4. Select the drive from the menu. 5. Follow the instructions - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 57
the Easy-Setup menu. 2. Go to the keyboard diagnostic test menu by pressing Ctrl+K. 3. Check that when each key is pressed, the key position on the keyboard layout on the screen changes to a black square. Note: When a Fn key is pressed, the black square briefly appears. ThinkPad 340x (IBM 2610) 47 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 58
shows an overview of the system features. Feature Processor Memory (Standard) Memory (Option) CMOS RAM VGA Video Diskette Drive Hard Disk Drive PCMCIA Description 340 - IBM486 SLC 25/ - 125MB, 2.5-inch 340CSE - 200MB, 2.5-inch - 360MB, 2.5-inch One Type-III or Type-II 48 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 59
service powered-on after FRU replacement, make sure all screws, springs, or other small parts, are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical shorts. ThinkPad 340x (IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 60
1010 Rear Connector Door Remove the rear connector door by flexing it. 1 1020 Battery Pack 1 2 50 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 61
3: Step 4: Standby Battery IC DRAM Card Backup Battery Note The IC DRAM card is sensitive to physical shock. Incorrect handling of the card can damage it. Note: When removing the backup battery or standby battery, use the connector extractor (P/N 39G9977). 1 24 3 ThinkPad 340x (IBM 2610) 51 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 62
1060 Top Cover Battery Pack (1020) 1 Step Location (Quantity) 1 Base cover (3) Note: Make sure you use the correct screw. Length 12 mm 3 2 4 52 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 63
1070 Indicator Card Battery Pack (1020) Top Cover (1060) 1 When Replacing Be careful to not break the pins of the indicator card connector. ThinkPad 340x (IBM 2610) 53 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 64
1080 Keyboard Unit Battery Pack (1020) Top Cover (1060) Notes: 1. There are two keyboard latches on each side of the computer frame. Slide the keyboard as shown in step 2 to release the keyboard from those latches; them remove the keyboard. (Small arrows on the both sides of the keyboard show the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 65
1090 LCD Assembly Battery Pack (1020) Top Cover (1060) Safety Notice 5: Translation on page 11 If the LCD breaks and the fluid from inside the . Do not pull the LCD cable. The cable can be damaged if it is disconnected without releasing the latch. 1 2 340 340CSE 2 2 1 1 ThinkPad 340x (IBM 2610) 55 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 66
4 3 3 Use the following table for reference when replacing parts. Step Location (Quantity) 1 LCD cable (1) 3 LCD hinge (4) Note: Make sure you use the correct screw. Length 6 mm 8 mm 56 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 67
1100 Diskette Drive 1110 Hard Disk Drive Battery Pack (1020) Top Cover (1060) Keyboard Unit (1080) Steps 1, 2, 3, 4: Diskette Drive Steps 5, 6: Hard Disk Drive When Replacing Before 5 Hard Disk Drive (2) Note: Make sure you use the correct screw. Length 8 mm 6 mm ThinkPad 340x (IBM 2610) 57 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 68
1120 System Board/Speaker Rear Connector Door (1010) Battery Pack (1020) Backup Battery (1030) IC DRAM Card (1040) Standby Battery (1050) Top Cover (1060) Indicator Card (1070) Keyboard Unit (1080) Diskette Drive (1100) Hard Disk Drive (1110) Step 1, 2, 3, 4: System Board Step 4, 5: Speaker 1 2 3 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 69
Locations System (Front View) 1 LCD 2 Contrast Control 3 Brightness Control 4 Status Indicator 5 Keyboard 6 LCD and Keyboard Latch 7 Click Button 8 Diskette-Eject Button 9 Diskette Drive 1 Fn Key 11 TrackPoint II/III 11 10 9 8 7 6 1 2 3 4 5 ThinkPad 340x (IBM 2610) 59 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 70
(Rear View) 1 External Display Connector 2 Serial Connector 3 PCMCIA Slot 4 Serial Connector 5 Reset Pushbutton 6 Power Jack 7 External Input Device connector 7 6 5 4 3 2 1 System (Interior View) 1 Backup Battery 2 IC DRAM Card Slot 3 Standby Battery 4 Battery Pack 4 3 2 1 60 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 71
Terminal 18 Standby Battery Connector 19 IC DRAM Card Connector 2 Diskette Drive Interface 21 Backup Battery Connector 2 3 4 5 6 7 8 9 10 11 1 21 20 19 18 17 16 Indicator Card 1 Resume/Suspend Switch 2 Power Switch 3 System board Interface 1 2 3 15 14 12 13 ThinkPad 340x (IBM 2610) 61 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 72
Parts Listing 17 16 15 14 13 12 1 2 3 4 5 6 7 8 9 10 11 62 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 73
Battery 84G6668 For U.S. 84G6667 For Japan 84G6670 14 Backup Battery 84G6666 Screw Kit (Includes the following) 84G6764 10-2.5 x 4 mm; 10-2.5 x 6 mm 10-2.5 x 8 mm, Flat head; 10-2.5 x 8 mm; 10-2.5 x 16 mm 10-hex stud I/O; 10-hex stud bus 2-washers for hex stud bus ThinkPad 340x (IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 74
16 Speaker (360CSE) 17 TrackPoint II Cap 17 TrackPoint III Cap Shield Plate (340) AC Adapter For Japan AC Adapter (small, 35W) For Japan DC Plug IC DRAM Card (See options) Keyboards Arabic Belgium Canadian 84G6880 84G6883 84G6877 84G6873 84G6871 84G6884 84G6869 84G6868 64 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 75
Basic IC DRAM CARD (no parity) 4MB Basic IC DRAM CARD (no parity) 16MB Keyboard/Mouse Cable Microphone PS/2 Miniature Mouse 84G5725 84G5724 84G5726 54G0444 66G7871 95F5723 Numeric Keypad Belgian Canadian Audio Wrap Cable Screwdriver Kit 72X8546 35G4703 66G5180 95F3598 ThinkPad 340x (IBM 2610) 65 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 76
1 6 2 7 3 8 4 9 5 10 Warning: Use only the power cord certified for your country. 30/40W 35W 1 Colombia, U.S., Venezuela 13F9959 25H2207 Japan, 2-pin 6454377 85G6665 Japan, 3-pin 25H2219 Note: The 30/40W cord is 6 feet long; the 35W cord is 6 inches. 66 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 77
ThinkPad 700, 700C, 720, 720C (9552) General Checkout 68 Memory Checkout 70 Power Systems Checkout 71 Power Management Features 81 Symptom-to-FRU Index 82 Numeric Error Codes 82 Beep Symptoms 88 Miscellaneous Symptoms 89 Undetermined Problem 93 Related Service Procedures 94 System Status - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 78
IBM products. Non-IBM ThinkPad 700C has an 89-key keyboard. This keyboard Power-off the computer and all external devices. 2. Check all cables and power cords for correct connection. 3. Make sure that no diskettes are in the drives. 4. Power-on all external devices. 5. Power IBM see "Power-On - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 79
Symptom Error Code or Message Configuration Problem Power Problem Memory Problem TrackPoint II or Pointing Stick Problem ThinkPad 700C, 720C Color LCD Problem ThinkPad 700, 720 Mono Panel Problem High Speed Modem Noise Problem Go to ... "Symptom-to-FRU Index" on page 82 "Checking the Installed - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 80
computer, then power it on. After the cursor moves to the upper right corner of the screen, press Ctrl+Alt+Insert to start the system program. - Press Ctrl+A at the Main Menu. DID THE ADVANCED DIAGNOSTIC MENU APPEAR? Yes No 002 Replace the base memory card. If the problem is not corrected - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 81
, run the memory tests multiple times to create an error log. Power Systems Checkout Note: One or all of the batteries can discharge if there is a short circuit in the system. 1. Replace the failing FRU if the power supply problem is caused by a short circuit. 2. Determine if one (or all) of - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 82
is plugged into the ac power outlet, replace the AC power outlet. 6. Measure the output voltage of the AC adapter. If the voltage is still not correct, replace the AC adapter. If the voltage is correct, plug the AC adapter cable into the computer and try the failing operation again. If the problem - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 83
not work with the car battery adapter. Note: If the output voltage from the cigarette lighter socket of the car is less than 10.5 V dc, the power-on indicator on the car battery adapter blinks and a continuous noise can be heard. Have the car battery serviced. ThinkPad 700, 700C, 720, 720C (9552 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 84
the battery pack and plug the AC adapter cable into the computer to charge the battery pack. If the battery power status indicator is blinking (orange) and battery charging indicator is on, replace the battery pack. If the battery is charging normally, the battery is OK. 74 IBM Mobile Systems - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 85
indicator cover. 4. Disconnect the standby battery connector from the voltage converter. 5. Plug the AC adapter cable into the computer and power-on the computer. 6. Measure the output voltage at the connector on the voltage converter. See the following figure. ThinkPad 700, 700C, 720, 720C (9552 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 86
1. Perform steps 1 through 3 of the "Checking the Battery Pack" to ensure the battery pack is operating correctly. 2. Connect the power cord to the quick charger and the other end to the ac power outlet. Ensure that the power-on indicator is on. If the power-on indicator does not turn on, check the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 87
, 700C): Use the following procedure to isolate a problem with the ThinkPad 700, 700C voltage converter. Note: If the problem only occurs when using the computer with a good battery pack, replace the voltage converter. 1. Power-off the computer. 2. Power-off all attached devices and disconnect them - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 88
): Use the following procedure to isolate a problem with the ThinkPad 720, 720C voltage converter. 1. Power-off the computer. 2. Power-off all attached devices and disconnect them from the computer. 3. Unplug the AC adapter cable, then remove the battery pack from the computer. 4. Carefully place - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 89
: a. Make sure the suspend switch (located to the left above the keyboard) is not activated during measurement of the voltage. b. Only PG is marked power problem did no reoccur, reconnect the devices removed in step 2 to isolate a device problem. If all the voltages are correct and the power problem - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 90
Processor card System board Video card Base memory card Keyboard control card Math coprocessor Diskette drive Hard disk drive LCD Indicator assembly VA x x x x x x x x x 11. If there is no short circuit, replace the following FRUs one at a time. Voltage converter System board 80 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 91
the power is heard if the Power controller beep parameter is set last operation with the keyboard, mouse, hard disk drive, a battery-low condition exists, the battery power indicator battery pack during full-suspend mode. Never replace the battery pack during partial-suspend mode. If the battery - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 92
to have available when servicing a computer. If you cannot correct the problem using this index, go to "Undetermined Problem" on page 93. symptoms in this index. 4. Check all power supply voltages before you replace the system board. See "Power Systems Checkout" on page 71. 5. IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 93
Reference Diskette.) (If setting configuration does not solve the problem, see "Checking the Installed Devices List" on page be cleared when a FRU is replaced. 1. See "Checking the Backup Battery" on page 75. 2. System Board 3. Voltage Converter 1. Set Board ThinkPad 700, 700C, 720, 720C (9552) 83 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 94
CPU chip / Processor Card 3. System Board 1. Voltage Converter 2. Keyboard Control Card 3. System Board 1. Voltage Converter 1. Run System Unit Board 2. Diskette Drive 1. PC Card 2. System Board 1. Keyboard Control Card 2. Keyboard 3. Pointing Device 1. Processor Card 1. System Board 1. System - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 95
00030500 (Power-on the computer before external devices.) (See "1080 Keyboard Unit" on page 54 before replacing any FRUs.) 00030200, 00030300, 00030400 (See "1080 Keyboard Unit" 2. Processor Card 1. System Board 2. Any Serial Device 3. Communication Cable ThinkPad 700, 700C, 720, 720C (9552) 85 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 96
Board 2. PCMCIA Card Slot 1. Do not replace any FRUs. The installed Memory Expansion Adapter is not supported by IBM. 1. Pointing Device 2. System Board 3. Numeric Keypad 1. System Board 2. Keyboard Control Card 3. Pointing Device 4. Keyboard (TrackPoint) 5. Numeric Keypad 86 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 97
3. Power-on the system. If the error remains, replace the Processor Card. 4. Repeat steps 1 and 2. 5. If the problem remains, replace the system board. 1. Indicator Assembly 2. System Board 3. Keyboard Control Card 4. Hard Disk Drive 5. Diskette Drive 6. Diskette Drive Cable 7. Speaker ThinkPad 700 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 98
1. Do not replace any FRUs. The installed Memory Expansion Adapter is not supported by IBM. 1. Reseat the hard disk drive to ensure good connection. 2. See Action System Board 1. See "1080 Keyboard Unit" on page 54 before replacing any FRUs. 2. Keyboard 3. Keyboard Control Card 4. System Board 1. - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 99
Power-on password is not reactivated. 1. Check the power-on password switch position. Problem occurs beep with a normal display during POST. 1. Speaker 2. System Board 3. Keyboard Control Card 4. Voltage Converter No beep and the system hangs with CP ThinkPad 700, 700C, 720, 720C (9552) 89 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 100
work. See "1080 Keyboard Unit" on page 54. Keypad problems. One or more keys do not work. FRU/Action 1. See important note for "LCD FRU Replacement Notice" on page 124. 2. LCD Assembly 3. System Board 1. LCD 2. Video Card 1. Normal operation (Dimming of LCD conserves battery power.) 1. LCD 2. Video - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 101
or moves erratically. External display problems. Incorrect memory size during POST. System hang or Intermittent hang. The system goes into suspend mode after the POST. The system does not suspend or resume. The computer does not power-off. FRU/Action 1. See "1080 Keyboard Unit" on page 54 before - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 102
problems. Parallel or parallel port device problems. Internal Data/Fax modem does not communicate with a remote modem or a facsimile machine. PS2 command cannot power-off internal modem unless computer is powered-off. FRU/Action 1. See "Checking the Backup Battery later.) 92 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 103
Undetermined Problem You are here because the diagnostic tests did not identify which adapter or device failed, the Devices List is incorrect or the system is inoperative. Follow the procedures below (do not isolate FRUs that are known to be good). Check the power supply that was being used at the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 104
Service Procedures This section provides information on the following: "System Status Indicators" "Check Point (CP) Codes" on page 96 "System Error Log" on page 96 "Checking the Installed Devices List" on page 97 "Power-On Password (700, 700C)" on page 97 "Power is enabled 94 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 105
car battery or AC power. Battery is charging Battery is full PC Card is in-use Diskette drive is active Hard disk drive is active Keyboard is in Num Lock mode Keyboard is in Caps Lock mode Keyboard is in Scroll Lock mode Computer is in Suspend Mode Computer is resuming normal operation ThinkPad 700 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 106
Status Indicated Computer is powered-on (blinking indicates temperature error log. For any error that is displayed, help screens guide you through the actions to take. Error Storage: The error log stores but you still suspect a problem, look at the error log. If errors were detected, press the F1 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 107
device that is not installed, go to "Undetermined Problem" on page 93. Power-On Password (700, 700C) Important This information is not available in this HMM online format. See your IBM Servicer or IBM Authorized Dealer for this procedure. Power-On Password (720, 720C) Important This information is - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 108
Power- the Reference Diskette, and power-off the computer. Continue power-off the computer. 10. Power problem, do the following: 1. Power-off Power-on the computer. Note: If the I99900X5 error message appears, the power-on password has been set. To disable the power-on password (see "Power Power-off - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 109
Format the hard disk and follow the instructions on the screen to perform a low level format of the hard disk. 6. After the hard disk format is completed, power-off the computer. 7. Restore the been loaded, the insert diskette icon will appear on the screen. ThinkPad 700, 700C, 720, 720C (9552) 99 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 110
then follow the instructions on the screen. reinstall the option files). For instructions on making a backup copy drive. 2. Power-off the computer, then power it on system partition and follow the instructions on the screen. This the diskette drive and power-off the computer, then power it on. 5. After - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 111
power it on. 2. After the cursor moves to the upper right corner of the screen, press Ctrl+Alt+Insert. 3. When the Main Menu appears, select Backup/Restore system programs, then select Backup the system partition. 4. Insert a blank 2.0MB diskette into the diskette drive and follow the instructions - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 112
700 Japanese model uses a diskette drive that supports 1.2MB format on 2.0MB capacity diskettes. When servicing a Japanese model, you must test all three formats. Notes: 1. The ThinkPad 700C Japanese model has an 89-key keyboard. This keyboard is identified by the additional keys at the left - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 113
) Memory (Maximum) CMOS RAM Video Diskette Drive Hard Drive Audio Subsystem PCMCIA (720, 720C only) Description 486SLC 25/50-MHz Micro Channel 4MB 16MB, IC DRAM 8KB VGA 3.5-inch 80MB, 2.5-inch 120MB, 2.5-inch 160MB, 2.5-inch Yes (Standard) One Type-III or Two Type-II ThinkPad 700, 700C, 720 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 114
page 13 Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, then disconnect any interconnecting cables. 1 Battery Pack (Press down and pull out) hard disk drive when the system is operating or in suspend 104 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 115
One Screw (S) and Keyboard Control Card 24 Two Screws (R) and Voltage Converter with Suspend Resume Pin (Set the lever on the voltage converter to the middle position before installation. Be sure the suspend pin is installed correctly before installing the voltage converter.) ThinkPad 700, 700C, 720 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 116
ThinkPad 700 Exploded View 106 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 117
ThinkPad 700 Exploded View (continued) ThinkPad 700, 700C, 720, 720C (9552) 107 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 118
ThinkPad 720, 720C Exploded View 108 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 119
ThinkPad 720, 720C Exploded View (continued) ThinkPad 700, 700C, 720, 720C (9552) 109 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 120
2 LCD 3 Contrast Control 4 Brightness Control 5 System Status Indicator 6 Power-On Light (green) 7 External Input Device Connector 8 System Power Switch 9 Keyboard 1 Reverse Video Switch 11 Hard Disk Drive 12 Integrated Pointing Stick 13 Battery Pack 14 Diskette-Eject Button 15 Diskette Drive 16 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 121
Interface 8 Video Card Interface 9 Backup Battery Connector 1 Processor Card Interface 11 Hard Disk Drive Connector 12 Speaker Connector 13 Voltage Converter Interface 14 System Status Indicator Connector 15 Keyboard Control Card Interface (Front side) (Rear side) ThinkPad 700, 700C, 720, 720C (9552 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 122
Password-override Connector 6 PCMCIA Connector 7 Base Memory Card Interface 8 Video Card Interface 9 Backup Battery Connector 1 Hard Disk Drive Connector 11 Processor Card Interface 12 Keyboard Control Card Interface 13 Speaker Connector 14 Voltage Converter Interface 15 Diskette Drive Interface 16 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 123
Video Card 1 External Display Connector 2 LCD Connector 3 System Board Connector 4 Communication Adapter Connector Keyboard Control Card (Front side) (Rear side) 1 Pointing Stick Connector 2 System Board Interface 3 Keyboard Connector 4 Keyboard Connector ThinkPad 700, 700C, 720, 720C (9552) 113 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 124
Voltage Converter (Front side) (Rear side) 1 Power Jack 2 Battery Pack Interface 3 System Board Interface 4 Standby Battery Connector 5 Suspend/Resume Switch 114 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 125
Parts Listing (700) 26 25 24 23 22 21 20 19 18 17 16 15 14 1 2 3 4 5 6 7 8 9 10 11 12 13 ThinkPad 700, 700C, 720, 720C (9552) 115 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 126
48G8712 7 Keyboard Control Card, 84-key (U.S.) 44G3783 Keyboard Control Card, 85-key 49G2096 Keyboard Control Card, Power Switch Knob/Actuator 49G2140 For Germany (Gray) 49G2156 LED Flexible Plastic Cable 49G2142 9 Backup Battery Service Procedures" on page 124. 116 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 127
44G3782 Video Card (700C) 35G4823 18 Tray 44G3773 19 Guide, Modem 44G3774 Modem Door (700) 53G7815 Modem Door (700 Drive 44G3776 23 Keyboard (see page 121) 24 Standby Battery 44G3799 For Benelux Parts Group includes keyboard support bracket, DC-in holder, battery terminal clip, stud - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 128
Parts Listing (720, 720C) 26 1 25 24 23 22 21 20 19 18 17 16 15 14 2 3 4 5 6 7 8 9 10 11 12 13 2 See "FRU Service Procedures" on page 124. 118 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 129
Keyboard Control Card 84-key 85-key 89-key 8 System Board (720) 8 240/340MB Upgrade System Board (720) 8 System Board (720C) 8 240/340MB Upgrade System Board (720C) Power Switch Knob/Actuator For Germany (Gray) LED Junction 9 Backup Battery FRU Service Procedures" on page 124. ThinkPad 700, 700C, - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 130
Miscellaneous Parts Group (720) Miscellaneous Parts Group (720C) Parts Group includes Keyboard support bracket, DC-in holder, battery terminal clip, LCD cable clamp, mouse bracket shield, stud, Heat Sink 53G9198 53G7819 49G2053 49G2155 49G2196 49G2197 54G0439 53G9318 120 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 131
AC Adapter (50 W) AC Adapter for Japan, 3-pin Car Battery Adapter Keyboard/Mouse Cable IBM ThinkPad Port Replicator IBM IC DRAM Memory Card, 2MB IBM IC DRAM Memory Card, 4MB IBM IC DRAM Memory Card, 8MB Miniature Mouse NiMH Battery with Indicator Quick Charger Quick Charger for Japan, 2-pin 48G8942 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 132
Kit 95F5741 95F5466 95F5467 95F5467 95F6313 95F6314 95F5467 95F5741 95F5467 95F6316 79F6401 95F5467 95F6315 95F5468 95F5711 95F5715 95F5467 95F5741 95F5741 72X8546 35G4703 66G5180 95F3598 122 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 133
Cords 1 6 2 7 3 8 4 9 5 10 Warning: Use the power cord certified for your country. 1 Colombia, U.S., Venezuela Japan, 2-pin Japan, 3-pin 2 Hong Kong, Singapore, 65F0031 14F0033 13F9979 14F0069 13F9940 13F9997 14F0087 14F0015 14F0051 1838574 ThinkPad 700, 700C, 720, 720C (9552) 123 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 134
FRU Service Procedures Review these service procedures before replacing a FRU. LCD FRU Replacement supports are included in the Mono Panel Cover Group Kit. High-Speed Modem Noise Problems: A small number of high speed modems might produce a noise when the system is powered-on. To solve this problem - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 135
ThinkPad 701C/701CS (2630) Checkout Guide 127 General Checkout 128 Memory Checkout 128 Keyboard/Auxiliary Input Device Checkout . . . 131 TrackPoint III Checkout 132 Diskette Drive Checkout 133 Hard Disk Drive Checkout 133 MultiPort II Checkout 134 Power Systems Checkout 135 Infrared - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 136
188 Inverter Card (Rear View 188 MultiPort II (Front View 189 MultiPort II (Rear View 189 Parts Listing 190 Common/Option Parts List 192 126 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 137
and Canada, the ThinkPad 701C/701CS is serviced only through EasyServe. Use the following procedure as a guide for computer problems: 1. Ask the any FRU, see "FRU Removals and Replacements" on page 161. Symptom Power failure. (The power indicator does not go on or stay on.) POST does not complete. - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 138
tests, see "Running the Diagnostics" on page 156. For information on how to disable the password, see "Removing the Power-On Password" on page 156. 7. Find your symptom in the table in "Checkout Guide" on page 127, and then go to the appropriate page. Otherwise, see "Symptom-to-FRU Index" on page - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 139
about installing SO-DIMMs, see "FRU Removals and Replacements" on page 161. 1. Power-on the computer. Press the F1 key any time while the POST memory count is FRU only when a recurring problem exists. If you suspect that problems besides a failing FRU exist, ThinkPad 701C/701CS (2630) 129 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 140
power and install a charged battery pack. 4. Insert the Flash update diskette in drive A. 5. Power-on the computer. 6. Follow the instructions as they appear to update Flash memory. 7. Power-off the computer, and then power board that failed, marking it "to be reflashed." 130 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 141
perform the following tasks one at a time to correct the problem: Note: Do not replace a nondefective FRU. Reseat the three cables. Replace the keyboard. Replace the top system board. The following auxiliary input devices are supported for this computer through the MultiPort II: Numeric keypad Mouse - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 142
III pointer when the computer is powered on, when the system is running does not indicate a hardware problem. No service actions are necessary if the problem: Note: Do not replace a nondefective FRU. Reseat the three keyboard cables. Replace the keyboard. Replace the top system board. 132 IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 143
problem to a controller, drive, or diskette. For this test, you need a scratch, write-enabled, double-sided, high-density diskette (2.0MB that formats to 1.44MB) that is known to be good. 1. Power the Diagnostics" on page 156 for instructions.) Select the FDD-1 icon and ThinkPad 701C/701CS (2630) 133 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 144
problem. The MultiPort II attaches to the system expansion connector at the rear of the computer. 1. Power port on the MultiPort II. 5. Power-on the computer. 6. Press the Diagnostics" on page 156 for instructions.) 10. Run the diagnostics tests 12. If power problems appear only when using the MultiPort II - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 145
be in the suspend mode). The battery cannot be charged if the computer is powered-off. If you suspect a power problem, see the appropriate power-supply check listed below: "Checking the AC Adapter." "Checking the Battery Pack" on page 136. "Checking the Standby Battery" on page 137. Checking the AC - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 146
top system board. If this does not correct the problem, go to "Undetermined Problems" on page 152. Note: An audible noise from the battery. Note: To remove the battery, end external communications if you are not using an AC adapter. Power-off the computer, and then close the lid. Unlock the battery - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 147
while on or in suspend mode for 24 hours. The computer can be used normally while the standby battery is charging. If any problem is not corrected after charging the standby battery, perform the following steps. 1. Power-off the computer and unplug the AC adapter from the computer. 2. Remove the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 148
infrared transceiver serial port at a speed of 115KB per second. 2. Type characters on the ThinkPad 701C/701CS keyboard and check to see whether or not these characters appear on the remote system. (Note software package and that the setup parameters are correct. 138 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 149
the following steps to test the PCMCIA** slots: 1. Power-off the computer, and then power it on again. 2. Press the F1 key any instructions on installing test cards, see "Running the Diagnostics" on page 156. For instructions on inserting the cards, see "Removing PCMCIA Cards" on page 159.) ThinkPad - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 150
and error description message appear. Go to "FRU Codes" on page 144 and replace the FRU. 9. To exit from the test screen, press Esc. 140 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 151
are not available, use the other symptom tables that describe specific symptoms. If the symptom is not listed, go to "Undetermined Problems" on page 152. Note: For IBM devices not supported by diagnostics codes of ThinkPad 701C/701CS, see the manual for those devices. ThinkPad 701C/701CS (2630) 141 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 152
195 (The hibernate partition does not match memory size.) FRU/Action 1. Battery. 2. AC Adapter 3. Memory Option. 4. Top System Board. 1. Bottom Board. 1. Press Fn+F1 to enter the Configuration Utility, and then reset the Power-on Password. 1. Check if the disk drive is from another computer or if - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 153
.) 2XX 3XX (Before replacing FRUs, power-off, and then power-on the computer.) 6XX 09XX, 10XX Remove attached external devices. 2. Reseat cables. 3. Keyboard 4. Top System Board 1. Go to "Diskette System Board 1. External Display. 2. External Display Power Cord. 3. Backlight Lamp Assembly. 4. LCD - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 154
Keyboard. 4. Numeric Keypad. 5. Top System Board. 6. Bottom System Board. 1. Bottom System Board. 1. Go to "Hard Disk Drive Checkout" on page 133. 2. Hard Disk Drive 3. Bottom System Board 1. Go to "Undetermined Problems " on page 128.) External Keyboard External Mouse 144 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 155
the portion of the FRU that caused the error. If replacing a FRU does not correct a problem, see the device ID or error code from the previous failure. If they have changed, the new System Board 1. Boot device 2. System Board 1. Bottom System Board. 2. LCD Assembly ThinkPad 701C/701CS (2630) 145 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 156
Symptom/Error One long beep followed by four short beeps each time the power switch is operated. (System cannot power-on due to low battery voltage.) One beep every second. (System is entering Suspend mode due to low battery voltage.) Two short beeps with error codes. Two short beeps with blank - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 157
the Version button to display the driver level. Symptom/Error No beep, power-on indicator on, and a blank LCD during POST. LCD backlight not working or LCD brightness cannot be adjusted. LCD contrast cannot be adjusted (ThinkPad 701CS only). LCD screen unreadable, or Characters missing pels, or - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 158
) does not work. 1. Reseat the two larger keyboard cables. 2. Keyboard. 3. Top System Board. TrackPoint III does not work the MultiPort II while the computer was powered-off or in Suspend mode. Make sure the problems occur when the MultiPort II has been Top System Board. 148 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 159
sources 4. Top System Board The system will not power-off. 1. If you are in Suspend mode, resume by pressing Fn. Then, try to power-off. 2. Disconnect the computer from ac power. 3. Remove the battery. 4. If problem occurs consistently, replace the Top System Board. ThinkPad 701C/701CS (2630) 149 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 160
the battery fuel gauge is less than 90%. FRU/Action 1. Reseat the Inverter Card. 2. Replace the Inverter Card. 1. Check the AC adapter connection. Make sure that the computer is powered-on or in Suspend mode. 2. Check the Configuration Utility to ensure that the AC adapter is supplying the correct - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 161
check the volume level and the settings for Audio Power and Mute. 2. Attach external speakers or headphones and the Top System Board. Other audio problems. 1. Replace the Top System Board. does not work correctly. Printer problems. Serial or parallel port device problems. FRU/Action 1. See " - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 162
perform the following actions: Verify that all attached devices are supported by the computer. Verify that the power supply being used at the time of the failure is operating correctly. (See "Power Systems Checkout" on page 135.) 1. Power-off the computer. 2. Check the cables, wires, and connectors - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 163
a. Non-IBM devices b. Devices attached to the expansion bus connector c. Printer, mouse, and other external devices d. Battery pack e. Hard Error code 162 will occur. 4. Power-on the computer. 5. Determine whether the problem has changed. 6. If the problem does not occur again, reconnect the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 164
Service from Suspend mode. Enters the Configuration Utility. Turns the battery-gauge icon on and off. Enters Standby mode. Enters Suspend key does not provide this function on ThinkPad 701C as TFT screens do not require contrast does not provide this function on ThinkPad 701C as TFT screens do not - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 165
battery power level. Understanding the Power-On Self-Test Each time you power-on the computer, the power-on self-test (POST) is initiated. The POST takes up to 90 seconds to complete, depending on the options installed. The POST checks the following items: system boards, memory, display, keyboard - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 166
bootable diskette in the diskette drive and press F1 to resume operation. Removing the Power-On Password Important This information is not available in this HMM online format. See your IBM Servicer or IBM Authorized Dealer for this procedure. Running the Diagnostics Use either the TrackPoint III or - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 167
or press Esc. The error log is not saved when system power is turned off. Checking Installed Devices Installed devices are displayed as Replace the first device, such as HDD-1. 2. If the problem persists, replace the relevant system board. The PCMCIA, System Board ThinkPad 701C/701CS (2630) 157 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 168
the tests. When asked for an "OK" response, press Enter or select the OK button. 1. Power-off the computer, and then power it on again. 2. Press the F1 key any time while the POST memory count is proceeding. When fails, replace the FRU shown in the diagnostics error code. 158 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 169
or 8MB (on the system board). 4, 8, or 16MB SO-DIMM. Local bus for hard drive and video (with hardware line draw, BITBLT, cursor, and sprite support). ISA bus ThinkPad 701C/701CS (2630) 159 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 170
ThinkPad 701C 10.4-inch, 640 × 480, 256/226K color, TFT LCD color. 1.44MB (3-mode for Japan, 2-mode for other countries) 3.5-inch external. 360MB, 2.5-inch 540MB, 2.5-inch 720MB, 2.5-inch (optional) Built-in speaker Built-in microphone. Microphone jack. Speaker/headphone jack. Line-in jack. Supports - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 171
the numerical sequence in "Disassembling the ThinkPad 701C/701CS" on page 163 and the three exploded views to remove or disconnect parts in the correct order. Reverse the numerical sequence to replace FRUs. Note exceptions and special instructions for replacement throughout the FRU removal procedure - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 172
. Torque to 2.5 in./lb. Safety Notice 8: Translation on page 13 Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, then disconnect any interconnecting cables. Safety Notice 1: Translation on page 7 Before the computer is - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 173
701CS This procedure provides the steps required to completely disassemble the ThinkPad 701C/701CS. The three exploded views show the parts of The numbered callouts in the figures correspond to steps in the procedure. ThinkPad 701C/701CS Exploded View 1 5 BF 9 6 BC 2 4 10 BC 10 10 BC BC 7 BK 10 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 174
ThinkPad 701C/701CS Exploded View 14 15 20 16 17 8 11 BC 12 13 24 22 18 19 BG 23 13 21 19 BG 3 9 BF 164 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 175
ThinkPad 701C/701CS Exploded View 29 28 BA BL 25 30 31 26 BC 28 BJ 27 32 33 34 2 ThinkPad 701C/701CS (2630) 165 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 176
the ThinkPad 701C/701CS. In those situations, the relative sequence of steps in this procedure is important. Some FRUs must be removed to reach the failing FRU, or to make it easier to work with another FRU. This procedure contains instructions for the following: Removing the Keyboard Cover - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 177
Keyboard 9 Remove the four screws (BF) located on the front, below the keyboard in the base and the keyboard shelf, perform the steps keyboard screws are in place. 2. Replace the keyboard shelf. 3. Replace the front keyboard the keyboard, shown in the figure on page 164. To remove the keyboard, - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 178
connector. 13 Detach the three keyboard cables from the top system board shown in the figure on page 164. The keyboard cables use zero insertion force (ZIF) connectors. Instructions for working with ZIF connectors: cable behind the PCMCIA slot assembly. For information on 168 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 179
for the LCD assembly. See "Replacing the LCD Assembly" on page 175 for instructions on replacing the LCD assembly. Removing Top System Board and Inverter Card 21 Remove the top system board and the attached standby battery and inverter card, shown in the figure on page 164. Reuse the rubber spacers - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 180
100 degrees C (212 degrees F), incinerate it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use of an incorrect battery can result in ignition or explosion of the battery. Replacement batteries can be ordered from IBM or IBM Authorized - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 181
the modem, you may need to apply a new adhesive gasket. Taking Apart the Base Assembly 31 Remove the power switch cover, shown in the figure on page 165. Warning: The speaker can magnetize metal and corrupt a 165. If the screen over the speaker is damaged, replace it. ThinkPad 701C/701CS (2630) 171 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 182
the fluid are present after washing. 1 Remove the two bottom screws (BH). 2 Remove the left hinge cover (cam). 3 Remove the four bezel screws (BD). 172 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 183
scratch or apply any force to its surface. Important The LCD for the ThinkPad 701C contains over 921 000 thin film transistors (TFTs). A small number of the time) is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 184
that the foam does not cover the microphone diaphragm. When installed correctly, the microphone lines up with the two small slots in the bezel. 174 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 185
core forward on the cable until the core touches the connectors and it can be pressed down flat on top of the bottom system board. ThinkPad 701C/701CS (2630) 175 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 186
base cover. (It must be outside of the inverter insulator.) 3. Loop the brown wire toward the LEDs and over the top of the connector. 176 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 187
. Do not allow the wires to cross. 5. Be careful to keep the cable in the correct position as you complete the assembly of the computer. ThinkPad 701C/701CS (2630) 177 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 188
power switch cover forward toward the front of the base assembly. Make sure that the spring in the power power switch cover with the switch mechanism on the board. 3. Gently press the battery card, follow these steps: 1. Power-off the computer. 2. Remove the battery. 3. Disconnect all cables and - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 189
. 7. Remove the card by holding it at a 15 to 20 degree angle and pulling it firmly away from the SO-DIMM socket. 8. insert a SO-DIMM card, follow these steps: 1. Power-off the computer. 2. Remove the battery. 3. Disconnect all cables and other devices, including the ThinkPad 701C/701CS (2630) 179 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 190
, one on either side of the card. 10. Replace the SO-DIMM door. 11. Reattach all cables and other devices, including the AC adapter, and power-on the computer. 12. Verify that the memory count displayed during the POST is correct. (See "Memory Checkout" on page 128 for information on memory - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 191
Locations System (Front View) 1 Latches 2 LCD 3 Keyboard 4 Click Buttons 5 TrackPoint III 6 Fn Key 7 Status Indicators See "Reading Status Indicators" on page 155. 1 2 3 7 6 5 4 ThinkPad 701C/701CS (2630) 181 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 192
Side View) 1 Power Jack 2 Power Switch 3 Parallel/Diskette Drive Connector 4 Microphone-In Jack 5 Line-In Jack 6 Headphone-/Speaker-Out Jack 12 3 456 System (Right Side View) 1 Battery Pack 2 Hard Disk Drive 3 PCMCIA Access Port 4 Slot for Kensington Lock 1 2 3 4 182 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 193
can be connected to this interface to support the following features: 16-bit AT-bus interface Serial port Parallel port Keyboard and mouse Hard disk drive connection LED control signals Video signals Audio signals Diskette drive PCMCIA Power controls Power line 1 2 3 ThinkPad 701C/701CS (2630) 183 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 194
Top System Board (Top View) 1 Keyboard Connectors 2 Inverter Card Connector 3 Microphone Connector 4 Speaker Connector 5 Battery Pack Connector 6 Lid Close Sensor 7 Parallel/Diskette Drive Connector 8 TrackPoint III Connector 8 1 2 3 4 7 5 6 184 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 195
View) 1 Inverter Card Connector 2 Power Jack 3 Power Switch 4 Parallel/Diskette Drive Connector 5 Microphone-In Jack 6 Line-In Jack 7 Headphone-/Speaker-Out Jack 8 Standby Battery Connector 9 Battery Pack Connector 1 Board-to-Board Connector 1 2 3 4 5 6 7 10 9 8 ThinkPad 701C/701CS (2630) 185 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 196
Bottom System Board (Top View) 1 System Expansion Connector 2 LCD Connectors 3 PCMCIA Controller 4 PCMCIA Slots 5 System Controller 6 Board-to-Board Connector 7 Video Controller 1 2 3 4 7 6 5 186 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 197
Bottom System Board (Bottom View) 1 PCMCIA Connector 2 Processor 3 System Expansion Connector 4 Modem Connector 5 Random Access Memory 6 SO-DIMM Connector 7 Hard Disk Drive Connector 8 RTC Battery 9 Power-On Password Bypass Pads 1 2 34 8 5 7 69 ThinkPad 701C/701CS (2630) 187 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 198
Inverter Card (Front View) 1 Light-Emitting Diodes 2 System Board Connector 1 2 Inverter Card (Rear View) 1 Light-Emitting Diodes 2 Infrared Serial Port 3 LCD Connector 3 1 2 188 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 199
MultiPort II (Front View) 1 Port Connector 1 MultiPort II (Rear View) 1 Release Lever 2 External Display Port 3 AC Adapter Port 4 External Mouse/Numeric Keypad Port 5 External Keyboard Port 6 Audio Out 7 Audio In 8 Parallel Port 9 Serial Port 1 2 3 4 5 6 7 8 9 ThinkPad 701C/701CS (2630) 189 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 200
Parts Listing 190 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 201
ThinkPad 701CS) 5 Color LCD (ThinkPad 701C) 6 LCD Bezel (ThinkPad 701CS) 6 LCD Bezel (ThinkPad 701C) 7a Keyboard Cam 7b Keyboard Hinge 8 Keyboard Shelf 9 See Keyboard Battery Door 23 Diskette Drive For Japan 24 Diskette Drive Cable 25 Parallel Port Door 26 Power Switch Cover 27 Standby Battery - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 202
Keyboards Country Arabic Belgian Canadian French Danish Dutch French German Greek Hebrew Italian Japanese Latin American Norwegian Portuguese Spanish Swedish/Finnish the system is from a different country. 2. The warranty for the system unit does not apply to all options. 192 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 203
Card) Standard Audio Wrap Cable Standard Screwdriver Kit TORX T1 Screwdriver TORX T6 Screwdriver Power Cords U.S., Canada Asia Pacific Latin America Europe Japan Warning: Use the power cord certified for your country. 72X8546 35G4680 66G5180 95F3598 10H4156 10H4157 04H6905 04H6906 04H6907 04H6908 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 204
194 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 205
Checkout (370C, 750Ce, 755C, 755Cs 203 Keyboard/Auxiliary Input Device Checkout . . . 203 TrackPoint II checkout 204 Pen and Digitizer Checkout (360P, 360PE, 750P) 205 Audio Card Checkout 205 Diskette Drive Test 206 Power Systems Checkout 207 Power Management Features 213 Symptom-to-FRU Index - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 206
281 2110 Backup Battery 282 2105 Standby Battery 282 2120 System Board Assembly 284 2130 PCMCIA Slot Assembly 286 2140 Processor Card (750Ce, 755C, 755Cs) . 287 Locations 289 System - Front View (750, 750Cx, 755Cx, 370C, 360x, 355x 289 System Front View - (750P, 360P, 360PE) . . 290 System - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 207
maintenance manual covers information about the following IBM ThinkPad models: 355, 360, 750 (monochrome) 355C, 360C, 360CE, 370C, 750C, 755C (TFT color) 750Ce (TFT color, enhanced) 355Cs, 360Cs, 360CSE, 750Cs, 755Cs (STN color) 360P, 360PE, 750P (pen). When information affects only a specific model - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 208
Before checking problems with the by excessive force shocked or dropped. Fuse blown by attaching non-supported device. Computer or hard disk could not be used because activity: Missing parts can be a symptom of unauthorized service or modification. HDD spindles can become noisy if subjected - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 209
the Power-On Password: Important This information is not available in this HMM online format. See your IBM Servicer or IBM Problems: If you suspect a problem with the Port Replicator, see "Port Replicator Checkout" in the "Common Devices Checkout" section for more information. ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 210
procedure as a guide for computer problems. Note: The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype cards then go to the page shown in the "Go to" column. Symptom Power failure. (The power indicator does not go on or stay on.) POST does not complete. No - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 211
isolate memory problems. Notes on Memory Errors For Models 355x, 360x, and 370C, ignore any references to parity errors. DIMM Adapter and DIMM card are not supported for 355x and 360x. Remove them the connector. Loose connection can cause an error. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 201 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 212
Vac power, or remove the battery during the Flash update. On certain systems, updating Flash memory can reset all customer's configuration settings to the default values. To update the Flash memory, perform the following steps: 1. Connect the AC Adapter and install the battery pack. 202 IBM Mobile - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 213
Service Diskette into drive A and power the problem. 1. keyboard appears on the screen. 3. Check that when each key is pressed, the key position on the keyboard layout on the screen changes to be a black square. Note: When a Fn key is pressed, the black square briefly appears. ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 214
the following one at a time to correct the problem. Do not replace a non-defective FRU. Reseat the three cables. Replace the keyboard. Replace the interposer card. Replace the system board. The following auxiliary input devices are supported for this computer. Numeric keypad Mouse (PS/2 compatible - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 215
360P, 360PE, 750P) To check the stylus pen and digitizer, do the following. 1. Press and hold the F1 key. 2. Power problem remains, replace the stylus pen. c. If the problem power- degrees Power-off the computer. 2. Insert the ThinkPad 750Ce hardware maintenance diskette into diskette drive A and power - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 216
can be selected by the pull-down menu of Setting-up. 6. Follow the instructions that appear on the screen to proceed with the tests. 7. If the tests problem. 7. If the drive is attached through an Expansion Unit, go to the service manual of the Expansion Unit to isolate the problem. 206 IBM Mobile - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 217
drive, and install the charged battery pack; then check that power is supplied by battery pack. If you suspect a power problem, see the appropriate power supply check listed below. "Checking the the AC Adapter cable. See the following figure. 2 1 ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 207 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 218
shows that less than 90% of the total power remains; with this condition the battery pack will charge to 100% of its capacity. This protects the battery pack from being over-charged or having a shortened life. Notes: a. Models 355x and 360x battery pack does not contain a microprocessor. In the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 219
is correct, replace the DC/DC card. 5. To check the charging circuit, do the following. Plug in the AC Adapter with the battery pack removed, then power-on the computer. 6. Measure the charging voltage between DC/DC terminals 1 (+) and 4 (−). ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 209 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 220
car is less than 10.5 V dc, the power-on indicator on the Car-Battery Adapter blinks and a continuous noise can be heard. The condition of the car battery should be checked by appropriate service personal. 2. The Car-Battery Adapter does not support operational charging. 210 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 221
start blinking, replace the quick charger. Checking the Backup Battery 1. Power-off the computer and unplug the AC Adapter from the computer. 2. Open the keyboard, and remove the battery pack and the diskette drive. 3. Remove the backup battery from the system board. 4. Measure the voltage of the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 222
Battery 1. Power-off the computer and unplug the AC Adapter from the computer. 2. Open the keyboard, and remove the battery pack and the diskette drive. 3. Remove the standby battery. 4. Measure the voltage of the standby battery dc, power-off the computer, replace the standby battery, and go - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 223
DC/DC card. If replacing the DC/DC card does not resolve the problem, replace the system board. Power Management Features Three power management modes are provided by the computer to save power consumption and prolong battery power. Standby Mode: When in standby mode the following occurs: The LCD - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 224
keyboard, mouse, hard disk drive, parallel connector, diskette drive, or the AC Adapter is plugged in. The time is specified by Suspend Timer in the ThinkPad Features program. The battery condition is low. The battery power computer is powered with ac power and one of the following IBM PC cards is - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 225
this problem by removing one of the devices, and use the computer under the same condition to see whether a power shut down occurs. Do this procedure for all devices, then determine the cause. Use of the larger AC Adapter (50W, optional) is recommended, if one is not yet in use. ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 226
also be used to help you decide which FRUs to have available when servicing a computer. Numeric error codes show the errors detected in POST or , go to "Undetermined Problems" on page 227. Notes: For IBM devices not supported by the diagnostic codes in this manual, see the manual for that device. If - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 227
3. System Board 118 (Memory parity error was logged in CMOS.) (Go to "Memory Checkout" on page 201.) 1. Run correct HDP. 161 1. Go to "Checking the Backup Battery" on page 211. 2. Backup Battery 3. System Board 163 (Time and Date was not ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 217 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 228
power was off when the startup sequence was being updated.) 186 188 190 (Depleted battery pack was installed when the power ThinkPad 750Ce hardware maintenance diskette. Note: You can use this maintenance diskette for all Models. 1. Go to "Checking the Battery Pack Board 218 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 229
the LCD connector (Pen, see "2070 LCD Assembly" on page 274). 2. LCD Assembly 3. System Board 1. PCMCIA Slot Assembly 2. PCMCIA Device 3. System Board 1. External Mouse 2. External Keyboard 3. System Board ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 219 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 230
I9990303 Other codes not listed above FRU/Action 1. Reseat the keyboard Track Point II cable at the interposer card. 355x, 360x See "1040 Keyboard Unit" on page 241. 370C, 750x, 755C, 755Cs See "2040 Keyboard Unit" on page 265. 2. Keyboard 3. External Mouse 4. System Board 1. Reseat the boot device - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 231
Card 1. Boot device 2. System Board 1. System Board 2. LCD Assembly Connect the AC Adapter or install a fully-charged battery. Connect the AC Adapter or install a fully-charged battery (allows system to complete shutdown before changing the battery). ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 221 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 232
LCD during POST. 1. System Board 2. DC/DC Card 3. Processor Card (370C, 750Ce, 755C, 755Cs) No beep, power-on indicator on, and a blinking cursor only during POST. 1. System Board 2. Processor Card (370C, 750Ce, 755C, the speaker 2. Speaker 3. Audio Card 4. DC/DC Card 222 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 233
LCD technology. Excessive pixel problems can cause viewing concerns. more. Symptom/Error No beep, power-on indicator on, and a blank Keyboard 3. Interposer Card 4. System Board Pointer moves automatically or does not work correctly. 1. See "TrackPoint II checkout" on page 204. ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 234
is installed. 2. Set the battery storage switch to ON. 3. Battery Pack 4. DC/DC Card 5. System Board Power Related Symptoms Symptom/Error FRU/Action Power shut down during operation. 1. Go to "Power Systems Checkout" on page 207. 2. Battery Pack 3. Remove the battery pack and let it cool for - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 235
4. DC/DC Card 5. System Board 1. Go to "Checking the Battery Pack" on page 208 and see the note. 1. Run the problems. 1. Run Printer Self-test. 2. System Board 3. Parallel Port Device 4. Cable Serial or parallel port device problems. 1. Device 2. Device Cable 3. System Board ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 236
360P, 360PE, 750P)" on page 205. 1. See "Port Replicator Checkout" in "Common Devices Checkout" section. 1. PCMCIA Slots Assembly Note: If you cannot find a symptom or error in this list and the problem remains, see "Undetermined Problems verify that no more errors exist. 226 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 237
isolate non-defective FRUs). Verify that all attached devices are supported by the computers. Verify that the power supply being used at the time of the failure is operating correctly. (See "Power Systems Checkout" on page 207.) 1. Power-off the computer. 2. Check the cables, wires, and connectors - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 238
231 "Fn Key Combinations" on page 231 "How To Run the Keyboard Diagnostics" on page 231 Status Indicators The system status indicators show the current computer 360, 360Cs, and 370C.) Battery fully charged Battery usable Battery low Battery almost depleted Battery storage switch is set off Battery - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 239
the same as selecting the OK icon to reply OK. 1. Press and hold the F1 key; then power-on the computer. Hold the F1 key down until Easy-setup screen appears. 2. Select Test and the advanced diagnostic mode. 3. Press Ctrl+E. 4. The error log appears. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 229 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 240
device, such as a FDD-1, HDD-1, or PCMCIA-1. 2. If the problem remains, replace the system board. PCMCIA-1, Parallel, and Serial icons are always 1. Power-off the computer. 2. Insert the ThinkPad 750Ce hardware maintenance diskette into diskette drive A and power-on the computer. 230 IBM Mobile - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 241
5. Follow the instructions on the screen keyboard diagnostic test menu by pressing Ctrl+K. 3. Check that when each key is pressed, the key position on the keyboard layout on the screen changes to be a black square. Note: When a Fn key is pressed, the black square briefly appears. ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 242
8, 16MB, Basic IC DRAM card (max. 16 MB) CMOS RAM 128 Bytes VGA Video 355, 360 - 9.5-inch (diagonally), 64 gray level, STN LCD monochrome 355Cs, 360Cs, 360CSE, 360P, 360PE - 9.5-inch (diagonally), 256/4096 color, DSTN LCD color 355C, 360C, 360CE - 8.4-inch (diagonally), 256/256K color, TFT LCD - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 243
(max. 16 MB) 4, 8, 16MB, DIMM card (max. 32 MB) DIMM card adapter CMOS RAM 128 Bytes VGA Video 10.4-inch (diagonally), 256/256K colors TFT LCD color Diskette Drive ( 16MB, IC DRAM card (max. 20 MB CMOS RAM 750x - 256 Bytes 750Ce - 128 Bytes ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 233 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 244
(diagonally), 64 gray level, STN LCD monochrome 0.720, 1.2, 1.44, 2.88MB (4-mode), 3.5-inch 170MB, 2.5-inch 340MB, 2.5-inch Standard One Type-III or Two Type-II 234 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 245
8, 16MB, IC DRAM card (max. 16 MB) 4, 16MB, DIMM card (max. 32 MB) DIMM card adapter CMOS RAM 128 Bytes VGA Video 755C - 10.4-inch (diagonally), 256/256K color, TFT LCD color - 10.4-inch (diagonally microphone PCMCIA One Type-III or two Type II ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 235 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 246
grounding. Do not damage any part. Only certified trained personnel should service the computer. The arrows in the "Removals and Replacements" section show Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 247
Removals Models 355x, 360x 1010 Rear Connector Door Remove the center latch 1 ; then remove the rear connector door by flexing it 2 . 1015 Foot To pivot in its hinge in the base cover Press the other pivot point into position with your thumb or finger ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 237 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 248
1020 Battery Pack Notes: 1. Be careful that the computer does not fall backward when the battery pack is removed. 2. Check that the keyboard latch springs are in place. 238 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 249
Pack (1020) Warning: 1. Check that the backup and standby batteries are seated correctly to prevent damage to the diskette drive. 2. Do not put any eject button. After replacing the diskette drive, latch the removal strap into the correct position. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 239 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 250
1035 Hard Disk Drive Battery Pack (1020) Warning: 1. Do not apply any extra force to the hard disk drive when removing it. Remove the hard disk drive is operating or is in suspend mode. After replacing the hard disk drive, latch the removal strap into the correct position. 240 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 251
cover or latches, be careful not to: Scratch the surface of the computer. Break the latches. 3 Open the keyboard. 4 Remove the leaf-spring plate. 5 When unlatching the upper cover latches to remove the upper cover, use a small screwdriver as shown. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 241 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 252
be damaged if the keyboard is disconnected without releasing the three latches 7 . 8 Remove the keyboard. Use the following table for reference when replacing parts. Step Location (Quantity) 2 Upper cover (2) Note: Make sure you use the correct screw. Length 8 mm 242 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 253
When replacing the keyboard, check that the place, be careful not to break the flexible cables. Go to "Keyboard/Auxiliary Input Device Checkout" on page 203 and test all keys the two latches located on the rear side of the cover into the guide of the LCD foot; then push the right, left, and front - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 254
physical shock. Incorrect handling of the card can damage it. The eject tape (P/N 53G9318) must be used to remove the card. 1055 Diskette Drive Bezel Battery Pack (1020) Diskette Drive(1030) Insert a coin between the diskette drive bezel and the computer as shown 1 and push the bezel from the bottom - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 255
1060 Status Indicator Battery Pack (1020) Keyboard Unit (1040) Warning: Do not pull the status indicator cable. The cable can be damaged if the indicator is disconnected (in step 2 ) without releasing the latch. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 245 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 256
. 1 2 2 Use the following table for reference when replacing parts. Step Location (Quantity) 1 Indicator bracket (2) Note: Make sure you use the correct screw. Length 4 mm 246 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 257
1070 LCD Assembly Battery Pack (1020) Keyboard Unit (1040) Status Indicator (1060) LCD Connector 355Cs, 360Cs 355, 360 360P 355C, 360C 1 When replacing the LCD ground-terminal screw, do not pull or push the LCD cables. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 247 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 258
damage to the LCD, do not scratch or apply any force to its surface. Do not put anything on the surface of the LCD. 248 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 259
(360x) Battery Pack (1020) Diskette Drive (1030) Hard Disk Drive (1035) Keyboard Unit (1040) Status Indicator (1060) Notes: 1. For Model 360x, use steps 9 through 12 to remove the bezel. 2. When the audio card is installed in Model 360x, modem card means audio card in the following step. ThinkPad - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 260
For the modem card: or For the audio card: Notes: 1. Gently lift the audio card in step 7 to avoid damaging the speaker cable. 2. Do not pull the speaker cable 8 before the audio card is removed 7 . 250 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 261
ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 251 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 262
4 mm 6 mm 4 mm Note: When you reinstall the upper shield, make sure the LCD ground-terminal is located correctly as shown in the circle. 252 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 263
Shield Assembly 1095 Interposer Card Battery Pack (1020) Diskette Drive (1030) Hard Disk Drive (1035) Keyboard Unit (1040) Status Indicator shield assembly does not hook the three flexible cables of the keyboard. For Model 360, gently raise the speaker shield assembly to avoid damaging the speaker - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 264
. Length 4 mm 6 mm 16 mm 16 mm Notes: 1. Verify that the spacer 1d is in the correct position. 2. 2 is a shield for radio frequency interference. 254 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 265
Battery Pack (1020) Diskette Drive (1030) Hard Disk Drive (1035) Keyboard supplied as miscellaneous parts. Use the following table for reference when replacing parts. Step 3 Location (Quantity) Power jack (1) Note: Make sure you use the correct screw. Length 8 mm (flat head) ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 266
it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use of an incorrect battery can result in ignition or explosion of the battery. Replacement batteries can be ordered from IBM or IBM Authorized Dealers. 256 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 267
unit serial number must also be restored. Use the Set system identification utility on the maintenance diskette to restore the number. Do not power-off the computer when restoring the VPD. The serial number label is attached to the bottom cover. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 257 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 268
not sticking out. 2. When replacing the system board assembly, align the power-key slide hub with the power-switch actuator by moving the power-key in the direction of the arrow. See the large circle in (1) Note: Make sure you use the correct screw. Length 4 mm 4 mm 258 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 269
Battery (1110) Standby Battery (1115) System Board Assembly (1120) Warning: The system board can be damaged if the lower shield touches the system board components. Carefully follow the next instruction. board straight forward as shown by step 2 . ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 259 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 270
replacing parts. Step Location (Quantity) 1 PCMCIA slot, upper (2) 2 PCMCIA slot, lower (2) Note: Make sure you use the correct screw. Length 12 mm 14 mm 260 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 271
the open position with one pivot in its hinge in the base cover Press the other pivot point into position with your thumb or finger ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 261 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 272
removed. 2. When replacing the battery pack, check that the storage switch of the new battery is set to the on (|) position. Do not operate the storage switch of a battery that has been used and is going to be re-used. 3. Check that the keyboard latch springs are in place. 262 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 273
Pack (2020) Warning: 1. Check that the backup battery and standby battery are seated correctly to prevent damage to the diskette drive when replacing the diskette . After replacing the diskette drive, latch the removal strap into the correct position. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 263 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 274
2035 Hard Disk Drive Battery Pack (2020) Warning: 1. Do not apply any extra force to the hard disk drive when removing it. Remove the hard disk drive is operating or is in suspend mode. After replacing the hard disk drive, latch the removal strap into the correct position. 264 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 275
cover or latches, be careful not to: Scratch the surface of the computer. Break the latches. 3 Open the keyboard. 4 Remove the leaf-spring plate. 5 When unlatching the upper cover latches to remove the upper cover, use a small screwdriver as shown. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 265 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 276
can be damaged if the keyboard is disconnected without releasing the three latches. 8 Remove the keyboard. Use the following table for reference when replacing parts. Step Location (Quantity) 2 Upper cover (2) Note: Make sure you use the correct screw. Length 8 mm 266 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 277
same time to make sure that each cable is correctly inserted. Go to "Keyboard/Auxiliary Input Device Checkout" on page 203 and test all keys before returning the upper cover, insert the two latches located rear side of the cover into the guide of the foot of the LCD; push the right, left, and front - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 278
2050 IC DRAM Card Battery Pack (2020) Diskette Drive (2030) For Models 370C, 755C and 755Cs, one of two types of memory card can be used, IC the following combinations occupies the slot depending on the configuration. IC DRAM card + IC DRAM card base DIMMs on DIMM adapter 268 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 279
2055 DIMM and DIMM Adapter (755C, 755Cs) Battery Pack (2020) Diskette Drive (2030) Press both locks at the same time and remove the DIMM. While holding the strap 1 , pull the DIMM adapter toward the front 2 to remove it. 1 2 ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 269 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 280
. c. Pivot the DIMM until it snaps into place. If you have another DIMM to install, insert it in the other socket the same way. 2 1 270 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 281
2056 Diskette Drive Bezel Battery Pack (2020) Diskette Drive(2030) Insert a coin between the diskette drive bezel and the computer as shown 1 and push the bezel from the bottom of the computer 2 to remove it. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 271 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 282
2060 Status Indicator Battery Pack (2020) Keyboard Unit (2040) Warning: Do not pull the status indicator cable. The cable will be damaged if the status circles in the figure show the locations of the three latches.) 2. Release the front latches. 3. Lift the indicator. 272 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 283
inserted. 1 2 2 Use the following table for reference when replacing parts. Step Location (Quantity) 1 Indicator bracket (2) Note: Make sure you use the correct screw. Length 4 mm ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 273 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 284
2070 LCD Assembly Battery Pack (2020) Keyboard Unit (2040) Status Indicator (2060) LCD Connector 370C, 750C, 750Cs Screw holds 755C, 755Cs 750 two flexible cables. 755C This figure shows the LCD that does not have a contrast control. (P/N 84G4337) 750P 274 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 285
, immediately wash the affected areas with water for at least 15 minutes. Seek medical care if any symptoms from the fluid are present after washing. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 275 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 286
avoid damaging the LCD, do not scratch or apply any force to its surface. Do not put anything on the surface of the LCD. 276 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 287
2080 Speaker Shield Assembly Battery Pack (2020) Diskette Drive (2030) Hard Disk Drive (2035) Keyboard Unit (2040) Status Indicator (2060) LCD Assembly (2070) Models 750x, 755C, and 755Cs ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 277 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 288
speaker shield assembly to avoid damaging the speaker cable and make sure that the shield assembly does not hook the three flexible cables of the keyboard. 3 Disconnect the speaker connector. 278 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 289
correct screw. Length 4 mm 6 mm 16 mm 16 mm 6 mm Notes: 1. 1d shows the correct position of the spacer. 2. 2 is a shield for radio frequency interference. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 279 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 290
Indicator (2060) LCD Assembly (2070) Speaker Shield Assembly(2080) 1 2090 Interposer Card Battery Pack (2020) Diskette Drive (2030) Hard Disk Drive (2035) Keyboard Unit (2040) Status Indicator (2060) LCD Assembly (2070) Speaker Shield Assembly (2080) Audio Card (2085) 280 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 291
Battery Pack (2020) Diskette Drive (2030) Hard Disk Drive (2035) Keyboard supplied as miscellaneous parts. Use the following table for reference when replacing parts. Step 3 Location (Quantity) Power jack (1) Note: Make sure you use the correct screw. Length 8 mm (flat head) ThinkPad 355x, 360x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 292
2110 Backup Battery 2105 Standby Battery Battery Pack (2020) Diskette Drive (2030) Model 750x 2 Standby Battery 3 Backup Battery Models 370C, 755C, and 755Cs 3 Standby Battery 4 Backup Battery 282 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 293
cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use of an incorrect battery can result in ignition or explosion of the battery. Replacement batteries can be ordered from IBM or IBM Authorized Dealers. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 283 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 294
Keyboard Unit (2040) Status Indicator (2060) LCD Assembly (2070) Speaker Shield Assembly (2080) Audio Card (2085) Interposer Card (2090) DC/DC Card (2100) Backup Battery (2110) Standby Battery to restore the number. Do not power-off the computer when restoring the VPD. The serial number label is - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 295
out. 3. When replacing the system board assembly, align the power-key slide hub with the power-switch actuator by moving the power-key in the direction of the arrow. See the large circle Note: Make sure you use the correct screw. Length 4 mm 4 mm ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 285 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 296
(2035) Keyboard Unit (2040) Status Indicator (2060) LCD Assembly (2070) Speaker Shield Assembly (2080) Audio Card (2085) Interposer Card (2090) DC/DC Card (2100) Backup Battery (2110) Standby Battery (2105) Note: Make sure you use the correct screw. Length 12 mm 14 mm 286 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 297
) Keyboard Unit (2040) Status Indicator (2060) LCD Assembly (2070) Speaker Shield Assembly (2080) Audio Card (2085) Interposer Card (2090) DC/DC Card (2100) Backup Battery (2110) Standby Battery ( Incorrect washer placement can cause metal to flake. ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 287 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 298
(6) 4 Processor card (1) 5 Processor card connector 750x - (2), 370C, 755C, 755Cs - (1) Note: Make sure you use the correct screw. Length Hex head Hex head 6 mm 4 mm 288 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 299
Front View (750, 750Cx, 755Cx, 370C, 360x, 355x) 1 LCD 2 Contrast Control Note: The Model 360 does not have a contrast control. The Model Lever 8 Keyboard 9 LCD and Keyboard Latch 1 TrackPoint II 11 Click Button 12 Diskette-Eject Button 13 Diskette Drive 14 Fn Key ThinkPad 355x, 360x, 370C, 750x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 300
System Front View - (750P, 360P, 360PE) 1 Convertible LCD 2 Contrast Control 3 Brightness Control 4 Status Indicator 5 External Input Device Connector 6 PCMCIA Slot 7 PCMCIA Release Lever 8 Keyboard 9 LCD and Keyboard Latch 1 Hard Disk Drive Compartment 11 Battery Compartment 12 Click Buttons 13 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 301
this interface to support the following features. 16-bit AT-bus interface Serial port Parallel port Keyboard and mouse HDD connection LED control signals Visual signals Audio signals FDD signals PCMCIA signals Power controls Power line 11 Connector Door 12 Rear Door ThinkPad 355x, 360x, 370C, 750x - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 302
System Board (Top View) 1 Power Switch 2 Modem Card Connector (355x, 360x) 3 Serial Connector 4 Audio Card Connector 5 Speaker Connector (370C only) 6 Parallel Connector 7 Interposer Card Connector 8 Card Connector 15 IC DRAM Card Connector 16 Diskette Drive Connector 292 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 303
System Board (Bottom View) 1 Power-On Password Connector 2 Backup Battery Connector 3 Standby Battery Connector 4 IC DRAM Card Connector 5 Processor Card Connector (750Ce, 755C, 755Cs) ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 293 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 304
Processor Card (370C, 750Ce, 755C, 755Cs) 1 System Board Connector DC/DC Card - Top View 1 External Power Jack 2 Battery Pack Terminal Models 355x, 360x Models 370C, 750x, 755x 294 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 305
Connector, Color 2 LCD Connector, Pen 3 LCD Connector, Monochrome and Color 4 LCD Power Connector, Color 5 Status Indicator Connector 6 Keyboard TrackPoint II Connector 7 Keyboard Signal Connector 8 Keyboard Signal Connector 9 LCD Open Detect Switch ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 295 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 306
Parts Listing Models 350x, 360x 35 2 3 5 34 33 32 31 30 29a 29 28 27 26 25 24 23a 23 22 21a 21 20 1 2 3 4 5 6 6a 6b 6c 7 8 9 10 11 12 13 14 15 19 18 17a 296 IBM Mobile Systems HMM 16 17 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 307
84G2253 10 PCMCIA Slot Assembly (1-slots, 355x) 84G2273 PCMCIA Slot Assembly (2-slots, 360x) 66G5121 11 System Board (355x) 84G2300 System Board (360, 360C, 360Cs, 360P) 84G2252 System Board (360CE, 360CSE, 360PE) 85G2409 12 HDD Removal Strap 66G5122 13 Hard Disk Drive (Includes strap - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 308
Card (See options) Audio Card (option) 32 Fax/Audio Spacer (360x) 33 Keyboard Lock 34 TrackPoint II Cap 35 See Keyboard List 36 Leaf Spring Plate 37 Upper Cover (355Cs, 360Cs, 360CSE) Upper Cover (Other models) 38 Stylus Pen (360P, 360PE) EMI Spring Plate PCMCIA Security Plate AC Adapter (100 - 240 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 309
Keyboard Arabic Belgium Canadian French Danish Dutch Finnish, Swedish French German (Black) Greek Hebrew Italian Japanese 84G5900 84G5898 84G5913 84G5910 84G5902 84G5916 84G5914 84G5908 84G5911 84G5905 84G5901 84G5899 84G5912 84G5897 84G5896 84G8348 ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 299 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 310
Model 370C 2 3 5 36 35 34 33 32 31 30 29 28 27 26 25 24 23a 23 22 21 20 1 2 3 4 5 6 6a 7 8 9 10 11 11a 12 13 14 15 19 18 17a 16 17 300 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 311
power switch knob, holder, latch buttons Base Cover Assembly For Benelux For Japan 19 Bezel, Diskette Drive 20 Cover, Option Bay 21 Blank Audio Bezel Audio Bezel Supported in Japan and European countries 22 Standby Battery 66G0031 84G6536 66G0041 ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 301 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 312
Index 36 Upper Cover PCMCIA Security Plate EMI Spring Plate DC Plug Keyboard Arabic Belgian Canadian French Danish Dutch Finnish French German (Black) Greek Hebrew Italian Japanese 66G0168 66G0162 66G0165 66G0159 66G0157 66G0155 66G0153 66G0166 66G0151 66G0150 85G7443 302 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 313
Model 750x 32 2 3 5 31 30 29 28a 28 27 26 25 24 23 22 21 20 1 2 3 4 5 6 7 8 9 10 11 11 a 12 13 14 15 19 18 17a 16 17 ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 303 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 314
66G9223 66G5046 66G5075 66G5041 66G3754 66G5044 66G9242 66G5038 66G9226 66G9267 66G5121 66G5036 66G6209 66G6211 66G9224 66G9225 84G4288 66G5122 4 See "Digitizer Adjustment" on page 205. 304 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 315
, foot, power switch knob, Battery Pack (Nickel Metal Hydride) For Netherlands, Belgium For Switzerland For Denmark, Sweden, Finland, Norway 25 Diskette Drive (Includes strap, reference 26) 26 Diskette Drive Removal Strap 27 Audio Card 28 Keyboard ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 316
Upper Cover (750P) For Germany (Gray) 32 Stylus Pen (750P)5 For Germany (Gray)5 Keyboard Arabic Belgian Canadian French Danish Dutch Finnish French German (Black) German (Gray) Greek Hebrew Icelandic 66G0166 66G0151 66G0150 5 See "Digitizer Adjustment" on page 205. 306 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 317
Models 755C and 755Cs 1 2 3 5 34 33 32 31 30 29 28 27 26 25 24 23a 23 22 21a 21 20 2 3 4 5 6 6a 7 8 9 10 11 11a 12 13 14 15 19 18 17a 16 17 ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 307 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 318
Name Label 18 Base Cover Assemblies include coil spring, insulator, foot, power switch knob, holder, latch buttons Base Cover Assembly For Benelux For Japan index 21a) 22 Standby Battery For Belgium, Dutch For Switzerland 23 Backup Battery 66G5058 84G4316 84G4337 84G4317 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 319
66G6444 66G0041 84G4318 66G0163 66G0161 66G0169 66G0160 66G0158 66G0157 66G0154 66G6402 66G0167 66G0164 66G0156 66G0171 66G0168 66G0162 66G0165 66G0159 66G0157 66G0155 66G0153 66G0166 66G0151 66G0150 ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 309 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 320
Kit (Includes DC-in holder, spacer, warning label) For Models 750x For Models 355x, 360x, 370C, 755C, 755Cs PC Card Locking Bar Screw Kit (Includes: 10-2.5 x 4 all options. Audio Cable Car Battery Adapter (48G9203 label sealed) Car Battery Adapter (66G9984 label sealed) IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 321
8MB DIMM 16MB DIMM Adapter Card Diskette Drive (4-mode) Supported in U.S. only. 84G5725 84G5724 84G5726 84G5917 84G8254 85G2367 66G5037 84G5725 84G5724 84G5726 66G5060 85G1952 85G6669 84G4320 49G2196 49G2197 84G4323 84G6545 84G4324 84G4322 66G5060 ThinkPad 355x, 360x, 370C, 750x, 755C, 755Cs 311 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 322
Keyboard/Mouse Cable Tools Tri-Connector Wrap Plug PC Test Card Screwdriver Kit ThinkPad ThinkPad.) 95F5741 95F5466 95F5467 95F5467 95F6313 95F6314 95F5467 95F5741 95F5467 95F6316 79F6401 95F5467 95F6315 95F5468 95F5711 95F5715 95F5467 95F5741 95F5741 54G0444 72X8546 35G4703 95F3598 82G3891 312 IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 323
Cords 1 6 2 7 3 8 4 9 5 10 Warning: Use the power cord certified for your country. 1 Colombia, U.S., Venezuela Japan, 2-pin Japan, 3-pin 2 Hong and 755Cs do not support the 30W AC adapter. The 30/40W cord is 6 foot long; the 35W cord is 6 inches. ThinkPad 355x, 360x, 370C, 750x, 755C - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 324
314 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 325
Indicator Related Symptoms 339 Power Related Symptoms 339 Function/Audio Related Symptoms 340 Peripheral Device Related Symptoms . . . . . 341 Other Symptoms 341 Infrared Related Symptoms 342 Intermittent Problems 342 Undetermined Problems 343 Related Service Procedures 344 Status Indicators - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 326
Lower Shield Assembly 379 2210 Memory Card 380 Locations 381 Front View 381 Rear View 382 Parts Listing 383 Common/Option Parts List 386 316 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 327
procedure as a guide for computer problems. The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype go to the page shown in the "Go to" column. Symptom Power failure. (The power indicator does not go on or stay on.) POST does not ThinkPad 755CD, 755CDV (9545) 317 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 328
memory problems. error. 3. Power-off the computer key; then power-on the Power-off the computer and reinstall the IC DRAM card or DIMM card; then power -on the computer. Verify the memory size; then test the memory. If an error appears, replace the IC DRAM card or the DIMM card. If memory problems - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 329
Flash Memory Do not power-off the computer, disconnect the Vac power, or remove the battery during the Flash update. . 2. Insert the System Program Service Diskette into drive A and power-on the computer. 3. Select problem, go to "Undetermined Problems" on page 343. ThinkPad 755CD, 755CDV (9545) 319 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 330
following one at a time to correct the problem. Do not replace a non-defective FRU. Reseat the three cables. Replace the keyboard. Replace the Video Card Assembly. Replace the system board. The following auxiliary input devices are supported for this computer. Numeric keypad Mouse (PS/2 compatible - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 331
powered on or while the system is running, or re-adjustment is required because the temperature has exceeded its normal temperature range. This symptom does not indicate a hardware problem. No service icon. Insert the blank diskette when instructed. 2. Run the diskette drive test. 3. If the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 332
AC Adapter, remove the hard disk and diskette drive, and install the charged battery pack; then check that power is supplied by battery pack. If you suspect a power problem, see the appropriate power supply check listed below. "Checking the AC Adapter." "Checking Operational Charging" on page 323 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 333
battery pack or a battery pack that shows a yellow or orange battery status indicator when it installed in the computer. Perform operational charging. If the battery status indicator turns orange and the battery charging indicator turns green within two minutes, replace the AC Adapter. ThinkPad - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 334
charging will not start until the Fuel-Gauge shows that less than 90% of the total power remains; with this condition the battery pack will charge to 100% of its capacity. This protects the battery pack from being over-charged or having a shortened life. Before you do the following steps, check - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 335
, then power-on the computer. 6. Measure the charging voltage between DC/DC terminals 1 (+) and 4 (−). 7. If the voltage is less then +9.0 V dc, replace the DC/DC card. If the voltage is more than +9.0 V dc, the charging circuit is working correctly, replace the battery pack. ThinkPad 755CD, 755CDV - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 336
The condition of the car battery should be checked by appropriate service personal. Checking the Backup Battery 1. Power-off the computer and unplug the AC Adapter from the computer. 2. Open the keyboard, and remove the battery pack. 3. Remove the backup battery from the shield assembly. 4. Measure - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 337
, replace the system board. Checking the Standby Battery 1. Power-off the computer and unplug the AC Adapter from the computer. 2. Open the keyboard, and remove the battery pack and the diskette drive. 3. Remove the standby battery. (Refer to "2100 Standby Battery and Front IR" on page 363 to remove - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 338
to standby battery will not be correct. Replace the DC/DC card. If replacing the DC/DC card does not resolve the problem, replace the system board. Power Management Features Three power management modes are provided by the computer to save power consumption and prolong battery power. 328 IBM Mobile - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 339
from the last operation with the keyboard, mouse, hard disk drive, parallel connector, diskette drive, or the AC Adapter is plugged in. The time is specified by Suspend Timer in the ThinkPad Features program. The battery condition is low. The battery power indicator blinks (orange). The PS2 OFF - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 340
The LCD is opened. (Resume) The keyboard is closed. (Resume) Real time clock Easy-Setup. The computer is powered with ac power and one of the following IBM PC cards is used. - battery condition. Event that causes the computer to exit the hibernation mode. The power-on switch is operated. When power - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 341
decide which FRUs to have available when servicing a computer. Numeric error codes show Problems" on page 343. Note: For IBM devices not supported by diagnostic codes of the ThinkPad computers, see the manual Battery" on page 326. 2. Backup Battery 3. System Board ThinkPad 755CD, 755CDV (9545) 331 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 342
. Suspect that power was off when the startup sequence was being updated.) 186 188 190 (Depleted battery pack was installed when the power was on.) 1. Set the system identification using the ThinkPad 750Ce hardware maintenance diskette. 1. Go to "Checking the Battery Pack" on page 324. 1. System - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 343
Device (Second) 2. Communication Cable 3. System Board 1. Hard Disk Drive 2. System Board 1. System Board 2. Video Card 1. PCMCIA Slot Assembly 2. PCMCIA Device 3. System Board 1. External Mouse 2. External Keyboard 3. System Board ThinkPad 755CD, 755CDV (9545) 333 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 344
on page 359. 2. Keyboard 3. External Mouse 4. Video Card 5. System Board 1. Reseat the boot device. 2. Check the startup sequence for the correct boot device. 3. Check that operating system has no failure, or is installed correctly. 1. System Board 1. Go to "Undetermined Problems" on page 343. FRU - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 345
FRU which caused the error. If replacing a FRU does not correct a problem, see the Device ID or error code from the previous failure. If they the power switch is operated. (System cannot power-on due to low battery voltage.) One beep every second. (System is shutting down due to low battery voltage - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 346
power-on indicator not on, and a blank LCD during POST. 1. Go to "Power Systems Checkout" on page 322. 2. System Board 3. DC/DC Card 4. Power sources No beep, power Card No beep, power-on indicator on, and but excessive pixel problems can cause No beep, power-on indicator on, and a blank - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 347
that the switch on the rear of the LCD is not stuck. If it is stuck, release it with the tip of a ball-point pen. ThinkPad 755CD, 755CDV (9545) 337 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 348
due to misuse, excessive force, scratch, or liquid spilled by the customer. Problem such as high environmental temperature might be the cause. Use the stand supplied with the computer. 1. Check that two AAA alkaline batteries are installed in the remote control. 2. Check that two AAA alkaline - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 349
320. 2. Keyboard 3. Video Card Power Systems Checkout" on page 322. 2. Battery Pack 3. Remove the battery pack and let it cool for two hours. 4. DC/DC Card 5. Power sources The system will not power-off. (See "Reset Pushbutton" on page 346.) 1. Press the Reset pushbutton. 2. System Board ThinkPad - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 350
system will not suspend or resume by opening or closing the keyboard. 1. Go to "Suspend Mode" on page 329 and 3. DC/DC Card 4. System Board Battery Fuel-Gauge does not go higher than 90%. Go to "Checking the Battery Pack" on page 324 and see the Problems" on page 342. 340 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 351
1. See "External Display Self-Test" in "Common Devices Checkout" section. Printer problems. 1. Run Printer Self-test. 2. Parallel Port Device 3. Cable 4. System find a symptom or error in this list and the problem remains, see "Undetermined Problems" on page 343. ThinkPad 755CD, 755CDV (9545) 341 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 352
Presentation F/X program and set the infrared to OFF; then observe the symptom. Intermittent Problems Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a code. Rerun the test to verify that no more errors exist. 342 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 353
isolate non-defective FRUs). Verify that all attached devices are supported by the computers. Verify that the power supply being used at the time of the failure is operating correctly. (See "Power Systems Checkout" on page 322.) 1. Power-off the computer. 2. Check the cables, wires, and connectors - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 354
Service Keyboard Diagnostics" Battery fully charged Battery usable Battery low, or if is green, the operational charge cannot be performed. Battery almost depleted Battery storage switch is set off if is blinking twice every 3 seconds, the battery is discharging. Battery - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 355
Caps Lock mode Keys in Scroll Lock mode Computer in suspend mode Computer resuming normal mode Computer powered on How to Run the Diagnostics Use either the TrackPoint III or the cursor move keys to notify that the exit interrupt is sensed by the test program. ThinkPad 755CD, 755CDV (9545) 345 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 356
power is powered-off. Reset Pushbutton The reset pushbutton resets the system and forces the power to be powered-off . Use this pushbutton when the power such as a FDD-1, HDD-1, or PCMCIA-1. 2. If the problem remains, replace the system board. PCMCIA-1, Parallel, and Serial IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 357
. 2. Insert the ThinkPad 755Ce hardware maintenance diskette into diskette drive A and power-on the computer. Note: You can use this maintenance diskette for all models. 3. Select Format the hard disk from the main menu. 4. Select the drive from the menu. 5. Follow the instructions on the screen - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 358
Power management mode switching (Toggles High power, Intelligent, Economy) Hibernation invocation How To Run the Keyboard Diagnostics Do the following to run the keyboard keyboard diagnostic test menu by pressing Ctrl+K. 3. Check that when each key is pressed, the key position on the keyboard - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 359
shows an overview of the system features. Feature Processor Bus Architecture Memory (Standard) Memory (Option) CMOS RAM VGA Video Diskette Drive (Removable) Hard Disk Drive (Removable) Super Video Card CD-ROM DSP port Two infra-red ports One Type-III or two Type-II ThinkPad 755CD, 755CDV (9545) 349 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 360
correct screw size as shown in the procedures. Safety Notice 8: Translation on page 13 Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting cables. Safety Notice 3: Translation on page 9 The - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 361
the open position with one pivot in its hinge in the base cover Press the other pivot point into position with your thumb or finger ThinkPad 755CD, 755CDV (9545) 351 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 362
removed. 2. When replacing the battery pack, check that the storage switch of the new battery is set to the on (|) position. Do not operate the storage switch of a battery that has been used and is going to be re-used. 3. Check that the keyboard latch springs are in place. 352 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 363
apply any extra force to the CD-ROM/Diskette drive when removing it. Warning: When replacing the CD-ROM/diskette drive, check that the standby battery is seated correctly to prevent damage to the drive. ThinkPad 755CD, 755CDV (9545) 353 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 364
2040 Hard Disk Drive CD-ROM Drive (2030) Battery Pack (2020) Warning: Do not drop or apply any shock to the hard disk drive. The hard disk drive is drive when removing it. Warning: After replacing the hard disk drive, latch the removal strap into the correct position. 354 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 365
2050 IC DRAM Card or DIMM Adapter CD-ROM Drive (2030) Battery Pack (2020) Note: One of the following combinations occupies the slot depending on the configuration. IC DRAM card of the card can damage it. The eject tape (P/N 53G9318) must be used to remove the card. ThinkPad 755CD, 755CDV (9545) 355 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 366
If the DIMM Adapter is installed: Press both locks at the same time and remove the DIMM. While holding the strap A , pull the DIMM adapter toward the front to remove it. 356 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 367
socket. c. Pivot the DIMM until it snaps into place. If you have another DIMM to install, insert it in the other socket the same way. ThinkPad 755CD, 755CDV (9545) 357 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 368
2060 Keyboard Spacer 358 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 369
2080 Keyboard Unit CD-ROM Drive (2030) Battery Pack (2020) Loosen the three screws 2 and 3 , and push 4 to release the five top cover latches at the rear side of the system unit. When removing the screw covers 1 , use a small screwdriver. ThinkPad 755CD, 755CDV (9545) 359 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 370
keyboard. Lower the keyboard and remove the top cover. Warning: Do not pull the keyboard cables. The keyboard cables will be damaged if the keyboard cable is correctly inserted. Go to "Keyboard/Auxiliary Input Device Checkout" on page 320 side of the cover into the foot guide of the the LCD; push the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 371
Step Location (Quantity) 2 Top cover (1) 3 Top cover (2) 6 Top cover (1) Note: Make sure you use the correct screw. Length 14 mm 4 mm 4 mm ThinkPad 755CD, 755CDV (9545) 361 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 372
2090 Status Indicator CD-ROM Drive (2030) Battery Pack (2020) Keyboard Unit (2080) Warning: Do not pull the status indicator cable. The cable will be damaged if the Step Location (Quantity) 1 LED Stand off (2) Note: Make sure you use the correct screw. Length 14 mm 362 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 373
IR Cable. B is the Standby Battery Cable. C is the IR Lens. Note: When replacing the battery, make sure the battery are seated correctly. Make sure the . Length 4 mm Safety Notice 2: Translation on page 8 The standby battery contains a small amount of nickel and cadmium. Do not disassemble it, - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 374
it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use of an incorrect battery can result in ignition or explosion of the battery. Replacement batteries can be ordered from IBM or IBM Authorized Dealers. 364 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 375
Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Standby Battery and Front IR (2100) Backup Battery (2110) The screw 1 is located at the rear bottom side. See next page. Note: When replacing the logic assembly, align the power-key slide hub with the power-switch actuator by moving - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 376
Step Location (Quantity) 1 Logic assembly (1) 4 Logic assembly (4) Note: Make sure you use the correct screw. Length 4 mm 8 mm 366 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 377
2120 Shield Assembly CD-ROM Drive (2030) Battery Pack (2020) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Standby Battery and Front IR (2100) Backup Battery (2110) Logic Assembly (2115) Step Location (Quantity) 1 Shield assembly (3) 2 Shield assembly (3) 3 Shield - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 378
Pack (2020) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Shield Assembly (2120) The connector is located under A . Do 4 and 5 after step 3 to remove the rear IR. 4 5 B 368 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 379
2130 DC/DC Card CD-ROM Drive (2030) Battery Pack (2020) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Shield Assembly (2120) Video Card or Rear IR (2125) ThinkPad 755CD, 755CDV (9545) 369 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 380
) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Shield Assembly (2120) Video Card or Rear IR (2125) DC-DC Card (2130) Remove the following: Mini-Jack Holder Modem Guide Modem Lever Microphone Cable - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 381
-ROM Drive (2030) Battery Pack (2020) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Shield Assembly (2120) Video Card or Rear IR (2125) DC-DC Card (2130) DSP Card (2140) ThinkPad 755CD, 755CDV (9545 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 382
2160 System Board Assembly CD-ROM Drive (2030) Battery Pack (2020) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Shield Assembly (2120) Video Card or Rear IR (2125) DC/DC Card (2130) DSP Card (2140) - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 383
2170 PCMCIA Slot Assembly CD-ROM Drive (2030) Battery Pack (2020) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Shield Assembly at each corner of the PCMCIA slot is ThinkPad 755CD, 755CDV (9545) 373 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 384
when replacing parts. Step Location (Quantity) 1 PCMCIA slot, upper (2) 2 PCMCIA slot, lower (2) Note: Make sure you use the correct screw. Length 4 mm 14 mm 374 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 385
CD-ROM Drive (2030) Battery Pack (2020) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Turn the system board upside down. Then remove any metal tape holding the card. ThinkPad 755CD, 755CDV (9545 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 386
following table for reference when replacing parts. Step Location (Quantity) 1 Processor card assembly Note: Make sure you use the correct screw. Length 14 mm 376 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 387
2190 LCD Assembly CD-ROM Drive (2030) Battery Pack (2020) Keyboard Unit (2080) Status Indicator (2090) Note: When removing the LCD cables 1 , pull the connector straight up. 15 minutes. Seek medical care if any symptoms from the fluid are present after washing. ThinkPad 755CD, 755CDV (9545) 377 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 388
push out and release the latches 1 . 1 1 Note: Do not touch the film 2 on the rear cover while the cover is removed from the LCD. 2 378 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 389
Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Shield Assembly (2120) Video Card or Rear IR (2125) DC/DC Card (2130) DSP Card (2140) Interposer Card (2150) Processor Card (2180) System Board Assembly (2160) ThinkPad 755CD - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 390
2210 Memory Card CD-ROM Drive (2030) Battery Pack (2020) Hard Disk Drive (2040) Keyboard Unit (2080) Status Indicator (2090) Backup Battery (2110) Standby Battery and Front IR (2100) Logic Assembly (2115) Shield Assembly ( the memory card, reseat the card and try again. 380 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 391
3 Brightness Control 4 Status Indicator See "Status Indicators" on page 344. 5 External Input Device Connector 6 Video-In Port 7 Video-Out Port 8 PCMCIA Slot 9 Keyboard 1 LCD and Keyboard Latch 11 Click Button 12 CD-ROM Drive 13 Front Infrared Port 14 Fn Key 15 TrackPoint III 16 Volume Knob 17 Built - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 392
be connected to this interface to support the following features. 16-bit AT-bus interface Serial port Parallel port Keyboard and mouse HDD connection LED control signals Visual signals Audio signals FDD signals PCMCIA signals Power controls Power line 12 Rear Infrared Port 382 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 393
Parts Listing 1 2 3 1a 4 2 45 3 4 5 44 43 6 7 8 42 9 41 10 40 11 39 12 38 13 37 14 36 15 35 16 34 33 17 32 18 31 30 19 29 28 20 27 21 22 23 24 26 25 ThinkPad 755CD, 755CDV (9545) 383 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 394
Board (755CD, 755CDV) 36 Power Switch Button 37 AV Panel 38 Battery Terminal (755CD) Battery Terminal (755CDV) 39 IC DRAM Card (See options) 40 DSP Card Assembly 41 DC/DC Card (755CD with Intel 486) DC/DC Card (755CD with Pentium, 755CDV) 42 CD-ROM Drive 43 Keyboard Security Plate 44 TrackPoint III - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 395
, System - Keyboard Interface Cable, keyboard - Keypad Cable, Mini-DIN to Mini-DIN Keyboard Spacer Shield Case component is provided by an outside company. See the warranty sheet supplied with this component. Call MindPath Technologies Inc. 12700 Park Central Drive ThinkPad 755CD, 755CDV (9545) 385 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 396
Keyboard Arabic Belgian Canadian French Common/Option Parts List Miscellaneous Parts Miscellaneous Parts Kit (Includes: modem guide; DC-in holder; spacer for video card; bracket for s-card; Singapore Sweden Switzerland Taiwan Thailand U.K. 386 IBM Mobile Systems HMM 84G6508 84G6506 84G6514 84G6505 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 397
Adapter (100 - 125 V ac, 40W) For U.S. only. Audio Cable Battery Pack (Li-ion, for 755CDV) Car-Battery Adapter Small Car-Battery Adapter Diskette Drive Attachment Unit IC DRAM CARD 2MB IC DRAM CARD 4MB IC DRAM 85G1530 85G1531 84G4323 84G6545 84G4324 84G4322 85G1529 ThinkPad 755CD, 755CDV (9545) 387 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 398
755x) Keyboard/Mouse Cable Tools Tri-Connector Wrap Plug PC Test Card Audio Wrap Cable Screwdriver Kit ThinkPad 750Ce Hardware Maintenance Diskette (This diskette is common to all ThinkPad models 84G6309 84G6297 84G2529 54G0444 72X8546 35G4703 66G5180 95F3598 82G3891 388 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 399
Cords 1 6 2 7 3 8 4 9 5 10 Warning: Use the power cord certified for your country. Country 30/40W 35W 1 Colombia, U.S., Venezuela 13F9959 25H2207 Japan, 2-pin 6454377 85G6665 25H2219 Note: The 30/40W cord is 6 feet long; the 35W cord is 6 inches. ThinkPad 755CD, 755CDV (9545) 389 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 400
390 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 401
Indicator Related Symptoms 416 Power Related Symptoms 416 Function/Audio Related Symptoms 417 Peripheral Device Related Symptoms . . . . . 417 Infrared Related Symptoms 418 Other Symptoms 418 Intermittent Problems 418 Undetermined Problems 419 Related Service Procedures 420 Status Indicators - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 402
Lower Shield Assembly 456 1210 Memory Card 457 Locations 458 Front View 458 Rear View 459 Parts Listing 460 Common/Option Parts List 464 392 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 403
as a guide for computer problems. Note: The diagnostic tests are intended to test only IBM products. Non-IBM products, go to the page shown in the "Go to" column. Symptom Power failure. (The power indicator does not go on or stay on.) POST does not ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 393 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 404
following procedure to isolate memory problems. Notes: a. Except Model loose connection can cause an error. 1. Power-off the computer and remove the IC DRAM and hold the F1 key; then power-on the computer. Hold the F1 Power-off the computer and reinstall the IC DRAM card or the DIMM card; then power - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 405
not power-off the computer, disconnect the Vac power, or remove the battery during System Program Service Diskette into drive A and power-on the computer 11, use the following procedure to isolate the problem. 1. Run the system board test to verify the ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 395 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 406
the following one at a time to correct the problem. Do not replace a non-defective FRU. Reseat the three cables. Replace the keyboard. Replace the interposer card. Replace the system board. The following auxiliary input devices are supported for this computer. Numeric keypad Mouse (PS/2 compatible - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 407
powered on or while the system is running, or re-adjustment is required because the temperature has exceeded its normal temperature range. This symptom does not indicate a hardware problem. No service the selected icon. Insert the blank diskette when instructed. 2. Run the diskette drive test. 3. If - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 408
and diskette drive, and install the charged battery pack; then check that power is supplied by battery pack. If you suspect a power problem, see the appropriate power supply check listed below. "Checking the AC Adapter plug of the AC adapter cable. See the following figure. 398 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 409
the problem is not corrected, go to "Undetermined Problems" on battery pack from being over-charged or having a shortened life. Before you do the following steps, check the following: The correct battery pack is used for the model. The storage switch set to on (|). 1. Power-off the computer. ThinkPad - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 410
2. Remove the battery pack and measure the voltage between battery terminals 1 (+) and 4 (−). See the following figure. Ni-MH Battery Pack Terminal 1 2 3 4 5 6 7 Storage Switch (T) Voltage (V dc) / Signal +8.0 to +16.0 Send Thermal Ground (−) NC NC NC 400 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 411
+8.0 V dc, the battery pack has been discharged or is defective. Recharge the battery. If the recharging does the battery. 4. If the voltage is more than +8.0 V dc, measure the resistance between battery Plug in the AC Adapter with the battery pack removed, then power-on the computer. 6. Measure the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 412
car is less than 10.5 V dc, the power-on indicator on the Car-Battery Adapter blinks and a continuous noise can be heard. The condition of the car battery should be checked by appropriate service personal. 2. The Car-Battery Adapter does not support operational charging. 402 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 413
. If the backup battery discharges quickly after replacement, replace the system board. Checking the Standby Battery 1. Power-off the computer and unplug the AC Adapter from the computer. 2. Open the keyboard, and remove the battery pack and the diskette drive. ThinkPad 755CE, 755CSE, 755CV, 755CX - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 414
and go to the next step. 7. Ensure that the AC Adapter is plugged into the computer; then power-on the computer. 8. Charging of the standby battery starts. A depleted battery needs approximately 30 minutes to be recharged to the operational voltage of +3.5 V dc. 9. Unplug the AC Adapter. 10. Verify - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 415
DC/DC card. If replacing the DC/DC card does not resolve the problem, replace the system board. Power Management Features Three power management modes are provided by the computer to save power consumption and prolong battery power. Standby Mode: When in standby mode the following occurs: The LCD - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 416
from the last operation with the keyboard, mouse, hard disk drive, parallel connector, diskette drive, or the AC Adapter is plugged in. The time is specified by Suspend Timer in the ThinkPad Features program. The battery condition is low. The battery power indicator blinks (orange). The PS2 OFF - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 417
can exceed the replicator power limit, thereby causing a power shut down. Isolate this problem by removing one of the devices and using the computer under the same condition to see whether a power shut down occurs. Do this procedure for all devices, then determine the cause. ThinkPad 755CE, 755CSE - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 418
which FRUs to have available when servicing a computer. Numeric error codes show Problems" on page 419. Note: For IBM devices not supported by diagnostic codes of the ThinkPad computers, see the manual to "Checking the Backup Battery" on page 403. 2. Backup Battery 3. System Board 163 (Time - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 419
. Suspect that power was off when the startup sequence was being updated.) 186 188 190 (Depleted battery pack was installed when the power was on.) 1. Set the system identification using the ThinkPad 750Ce hardware maintenance diskette. 1. Go to "Checking the Battery Pack" on page 399. 1. System - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 420
the LCD connector (Pen, see "1190 LCD Assembly" on page 453). 2. LCD Assembly 3. System Board 1. PCMCIA Slot Assembly 2. PCMCIA Device 3. System Board 1. External Mouse 2. External Keyboard 3. System Board 410 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 421
Keyboard 3. External Mouse 4. System Board 1. Reseat the boot device. 2. Check the startup sequence for the correct boot device. 3. Check that operating system has no failure, or is installed correctly. 1. System Board 1. Go to "Undetermined Problems .) Reserved External Keyboard External Mouse LCD - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 422
replacing a FRU does not correct a problem, see the Device ID or error the problem remains after replacement of the FRUs, go to "Undetermined Problems" on power switch is operated. (System cannot power-on due to low battery voltage.) One beep every second. (System is shutting down due to low battery - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 423
is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns. The LCD should be replaced on page 414 for LCD related symptoms. Symptom/Error No beep, power-on indicator on, and a blank LCD during POST. LCD backlight ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 413 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 424
Uneven color on the screen Spot on the screen The computer has an intermittent problem when you use it on the overhead projector. 1. Check that the white film . Problem such as high environmental temperature might be the cause. Use the stand supplied with the computer. 414 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 425
remote control. 2. Check that two AAA alkaline batteries in the remote control are at their normal energy (voltage) level. 3. Enable the IR port of the computer with the ThinkPad Features program. (Disable the serial port at this time.) 4. Refer to the trouble shooting section in the Help menu of - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 426
396. 2. Keyboard 3. Interposer Power Systems Checkout" on page 398. 2. Battery Pack 3. Remove the battery pack and let it cool for two hours. 4. DC/DC Card 5. Power sources The system will not power-off. (See "Reset Pushbutton" on page 422.) 1. Press the Reset pushbutton. 2. System Board 416 IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 427
opening or closing the keyboard. 1. Go to Battery Fuel-Gauge does not go higher than 90%. Go to "Checking the Battery problems. 1. Run Printer Self-test. 2. System Board 3. Parallel Port Device 4. Cable Serial or parallel port device problems. 1. Device 2. Device Cable 3. System Board ThinkPad - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 428
in this list and the problem remains, see "Undetermined Problems" on page 419. Intermittent Problems Intermittent system hang problems can be caused by a replacement should only be considered when a recurring problems exits. When analyzing the intermittent problem, do the following: 1. Run the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 429
isolate non-defective FRUs). Verify that all attached devices are supported by the computers. Verify that the power supply being used at the time of the failure is operating correctly. (See "Power Systems Checkout" on page 398.) 1. Power-off the computer. 2. Check the cables, wires, and connectors - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 430
Service page 423 "How To Run the Keyboard Diagnostics" on page 424 Status Indicators The system Battery almost depleted Battery storage switch is set off if is blinking twice every 3 seconds, the battery is discharging. Battery charging Orange PC card in-use Orange Orange Green Green Green 420 IBM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 431
the same as selecting the OK icon to reply OK. 1. Press and hold the F1 key; then power-on the computer. Hold the F1 key down until the Easy-setup screen appears. 2. Select Test and Press Ctrl+A to select the advanced diagnostic mode. 3. Press Ctrl+E. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 421 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 432
power is powered-off. Reset Pushbutton The reset pushbutton resets the system and forces the power to be powered-off . Use this pushbutton when the power such as a FDD-1, HDD-1, or PCMCIA-1. 2. If the problem remains, replace the system board. PCMCIA-1, Parallel, and Serial IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 433
755Ce hardware maintenance diskette into diskette drive A and power-on the computer. (You can use this maintenance diskette for all ThinkPad models.) 3. Select Format the hard disk from the main menu. 4. Select the drive from the menu. 5. Follow the instructions on the screen. PC Test Card LED The - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 434
when each key is pressed, the key position on the keyboard layout on the screen changes to a black square. Note Processor Bus Architecture Memory (Standard) Memory (Option) CMOS RAM VGA Video Diskette Drive (Removable) Hard Disk Microphone jack Headphone jack Modem port 424 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 435
Feature IR PCMCIA Description Two IR ports One Type-III or two Type-II ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 425 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 436
correct screw size as shown in the procedures. Safety Notice 8: Translation on page 13 Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting cables. Safety Notice 3: Translation on page 9 The - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 437
the open position with one pivot in its hinge in the base cover Press the other pivot point into position with your thumb or finger ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 427 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 438
removed. 2. When replacing the battery pack, check that the storage switch of the new battery is set to the on (|) position. Do not operate the storage switch of a battery that has been used and is going to be re-used. 3. Check that the keyboard latch springs are in place. 428 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 439
1030 Diskette Drive Battery Pack (1020) Note: Remove the diskette drive exactly as the drive may be damaged. Warning: When replacing the diskette drive, check that the backup battery and standby battery are seated correctly to prevent damage to the diskette drive. After replacing the diskette drive, - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 440
1040 Hard Disk Drive Battery Pack (1020) Notes: 1. Do not drop or apply any shock to the hard disk drive. The hard disk drive is sensitive to hard disk drive when removing it. Note: After replacing the hard disk drive, latch the removal strap into the correct position. 430 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 441
1050 IC DRAM Card or DIMM Adapter Battery Pack (1020) Diskette Drive (1030) Note: One of the following combinations occupies the slot depending on the configuration of the card can damage it. The eject tape (P/N 53G9318) must be used to remove the card. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 431 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 442
If the DIMM Adapter is installed: Press both locks at the same time and remove the DIMM. While holding the strap A , pull the DIMM adapter toward the front to remove it. 432 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 443
socket. c. Pivot the DIMM until it snaps into place. If you have another DIMM to install, insert it in the other socket the same way. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 433 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 444
1070 Diskette Drive Bezel Battery Pack (1020) Diskette Drive (1030) Insert a coin between the diskette drive bezel and the computer as shown 1 and push the bezel from the bottom of the computer 2 to remove it. 434 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 445
1080 Keyboard Unit Battery Pack (1020) Loosen the three screws 2 , and push 3 to release the four top cover latches at the rear side of the system unit. When removing the screw covers 1 , use a small screwdriver. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 435 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 446
keyboard cables. The keyboard cables can be damaged if the keyboard is disconnected without releasing the three latches 5. EMI Spring Plate Notes: 1. When replacing the keyboard correctly inserted. Go to "Keyboard/Auxiliary Input Device Checkout" on the cover into the foot guide of the LCD; push the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 447
1090 Status Indicator Battery Pack (1020) Keyboard Unit (1080) Warning: Do not pull the status indicator cable. The cable can be replacing parts. Step Location (Quantity) 1 LED Stand off (2) Note: Make sure you use the correct screw. Length 6 mm ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 437 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 448
IR Cable. B is the Standby Battery Cable. C is the IR Lens. Note: When replacing the battery, make sure the battery is seated correctly. Make sure the screw. Length 4 mm Safety Notice 2: Translation on page 8 The standby battery contains a small amount of nickel and cadmium. Do not disassemble it, - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 449
its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use of an incorrect battery can result in ignition or explosion of the battery. Replacement batteries can be ordered from IBM or IBM Authorized Dealers. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 439 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 450
1115 Logic Assembly Battery Pack (1020) Diskette Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) The screw 1 is located at the rear bottom side. See next page. 440 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 451
1 . See the large circle in the figure. Before tightening any screws, check that the power-switch operates correctly. Step Location (Quantity) 1 Bottom cover (1) 5 Logic assembly (4) Note: Make sure you use the correct screw. Length 4 mm 8 mm ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 441 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 452
1120 Shield Assembly Battery Pack (1020) Diskette Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) See the next page when you replace the parts. 442 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 453
cable to the right. The following figure shows the final path of the cable. Make sure the cable is not positioned in any shaded area. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 443 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 454
Use the following table for reference when replacing parts. Step Location (Quantity) 1 Shield cover (1) 2 Shield cover (2) 3 Shield cover (1) 4 Shield cover (1) Note: Make sure you use the correct screw. Length 4 mm 6 mm 14 mm Flat head 444 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 455
1130 DC/DC Card Battery Pack (1020) Diskette Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) Shield Assembly (1120) ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 445 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 456
Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) Shield Assembly (1120) DC-DC Card (1130) Remove the following: Mini-Jack Holder Modem Guide Modem Lever Microphone Cable Use the following - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 457
(1020) Diskette Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) Shield Assembly (1120) DC-DC sure you use the correct screw. Length 4 mm ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 447 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 458
1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) on the maintenance diskette to restore the number. Do not power-off the computer when restoring the VPD. The serial number IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 459
Pack (1020) Diskette Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) Shield Assembly (1120) DC/DC stand at each corner of the PCMCIA slot is ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 449 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 460
when replacing parts. Step Location (Quantity) 1 PCMCIA slot, upper (2) 2 PCMCIA slot, lower (2) Note: Make sure you use the correct screw. Length 4 mm 14 mm 450 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 461
) Diskette Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) Turn the system board upside down. Then remove any metal tape holding the card. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 451 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 462
following table for reference when replacing parts. Step Location (Quantity) 1 Processor card assembly Note: Make sure you use the correct screw. Length 14 mm 452 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 463
1190 LCD Assembly Battery Pack (1020) Keyboard Unit (1080) Status Indicator (1090) Note: When removing the LCD cables 1 , pull the connector straight Step Location (Quantity) 3 LCD hinge (4) Note: Make sure you use the correct screw. Length 4 mm ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 453 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 464
not use alcohol or detergent to clean the LCD. To avoid damaging the LCD, do not scratch or apply any force to its surface. 454 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 465
1195 LCD Rear Cover (755CV only) Slightly push out and release the latches 1 . 1 1 Note: While the cover is removed from the LCD, do not touch the film ( 2 ) on the rear cover. 2 ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 455 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 466
Pack (1020) Diskette Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) Shield Assembly (1120) DC/DC Card (1130) DSP Card (1140) Interposer Card and Rear IR (1150) Processor Card (1180 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 467
(1020) Diskette Drive (1030) Hard Disk Drive (1040) Keyboard Unit (1080) Status Indicator (1090) Standby Battery and Front IR (1100) Backup Battery (1110) Logic Assembly (1115) Shield Assembly (1120) DC/ the memory card, reseat the card and try again. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 457 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 468
Brightness Control 4 Status Indicator See "Status Indicators" on page 420. 5 External Input Device Connector 6 PCMCIA Slot 7 PCMCIA Release Lever 8 Keyboard 9 LCD and Keyboard Latch 1 Click Button 11 Diskette-Eject Button 12 Diskette Drive 13 Front Infrared Port 14 Fn Key 15 TrackPoint III 16 Volume - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 469
be connected to this interface to support the following features. 16-bit AT-bus interface Serial port Parallel port Keyboard and mouse HDD connection LED control signals Visual signals Audio signals FDD signals PCMCIA signals Power controls Power line ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 459 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 470
Parts Listing 2 3 4 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 1 1a 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 22 21 460 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 471
Lens, Front 28 IR Assembly, Front 29 Standby Battery 30 Base Plate 31 Memory Card (755CE, 755CSE, 755CV) Memory Card (755CX) 32 AV Panel 33 Power Switch Button 34 IC DRAM Card (See options) 84G6549 85G1039 84G6563 84G6561 85G8565 84G6552 84G6553 ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 461 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 472
Battery Terminal (755CE, 755CSE) Battery Terminal (755CV, 755CX) 36 DSP Card Assembly 37 DC/DC Card (755CE, 755CSE) DC/DC Card (755CV, 755CX) 38 Speaker 39 Diskette Drive (4-mode) Diskette Drive (3-mode) 40 Diskette Drive Removal Strap 41 Keyboard warranty sheet supplied with IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 473
Keyboard Arabic Belgian Canadian French Danish Dutch French German (Black) Greek Hebrew Italian Japanese Latin American 84G6499 84G6497 84G6512 84G6509 84G6501 84G6515 84G6513 84G6507 84G6510 84G6504 84G6502 84G6500 84G6498 84G6511 84G6496 84G6495 ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 463 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 474
Common/Option Parts List Miscellaneous Parts Miscellaneous Parts Kit (Includes Modem guide; modem lever; DC-IN holder; memory spacer; mini-jack holder; back-up battery holder; suspend-switch holder) Screw Kit (Includes 20-2.5 x 6 mm; 54F0717 59G1057 59G1067 59G1065 59G1045 464 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 475
(100 - 125 V ac, 40W) (This adapter is for U.S. only.) Audio Cable Car-Battery Adapter Small Car Battery Adapter Diskette Drive Attachment Unit IC DRAM CARD 2MB IC DRAM CARD 4MB IC DRAM CARD 8MB IC 85G1531 84G4323 84G6545 84G4324 84G4322 85G1429 ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 465 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 476
755x) Keyboard/Mouse Cable Tools Tri-Connector Wrap Plug PC Test Card Audio Wrap Cable Screwdriver Kit ThinkPad 750Ce Hardware Maintenance Diskette (This diskette is common to all ThinkPad models 84G6297 84G6309 84G2529 54G0444 72X8546 35G4703 66G5180 95F3598 82G3891 466 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 477
Cords 1 6 2 7 3 8 4 9 5 10 Warning: Use the power cord certified for your country. Country 30/40W 35W 1 Colombia, U.S., Venezuela 13F9959 25H2207 Japan, 2-pin 6454377 Note: The 30/40W cord is 6 feet long; the 35W cord is 6 inches. ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 467 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 478
468 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 479
-Test 470 External Keyboard/Auxiliary Input Device Checkout 471 Fax/Modem Checkout 472 Printer Checkout 474 Port Replicator Checkout 475 TrackPoint II Checkout 476 TV Tuner 477 Identifying Names and Functions 477 Using the Front Panel 478 Troubleshooting 481 © Copyright IBM Corp. 1995 469 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 480
run without errors, follow the instructions on the screen and insert a support 95XX displays. 95XX systems support either 63XX, 85XX, or 95XX displays. ThinkPad models support either 85XX or 95XX displays. If the screen is rolling, replace the display assembly. If that does not correct the problem - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 481
Input Device Checkout The following auxiliary input devices may be available for IBM ThinkPad models. - Numeric keypad - Mouse (PS/2 compatible) - External keyboard (with Keyboard/Miniature Mouse cable) If you suspect a problem with any of the auxiliary input devices (listed above), replace the - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 482
; then continue. Note: PCMCIA cards can be inserted and removed while the system is powered on. - Power-on the system. - Insert the IBM Data/FAX Modem diskette into the default diskette drive. - If you are servicing a High Speed Internal Data/Fax Modem (Models FC3632 and FC3650), at the DOS prompt - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 483
012 If installed, replace the external DAA. If you do not have an external DAA installed, or replacing the external DAA does not correct the problem, replace the modem. 013 Have the telephone line checked. 014 - Have the customer receive an incoming call on the modem at a lower speed. WAS THE - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 484
self-test. If the printer self-test does not run correctly, the problem is in the printer. Refer to the printer service manual. If the printer self-test runs correctly, do the following. 1. Verify a failure, replace the printer cable. If the problem is not corrected, replace the system board. 474 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 485
procedure. 7. If the advanced diagnostic device test does not find an error, suspect a problem with the port replicator or the system expansion bus. 8. Power-off the computer and reconnect the port replicator. 9. Power-on the computer and run the following advanced diagnostic tests: Serial port test - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 486
re-adjustment. If the cursor floats or moves erratically, power-off and disconnect the mouse. Power-on the computer. If the problem goes away, replace the mouse. If the problem remains, replace the keyboard. For click button or pointing stick problems: 1. Go to the Easy-Setup screen. 2. Select an - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 487
) is an option for watching TV programs or videos on the IBM TFT color notebook computer. The computer changes to TV reception when of the TV Tuner. 1 13 12 11 10 Icons 1 Front Panel 2 Headphone Jack 3 Power Indicator 4 Power Switch 5 Hot Key 6 Up Switch 7 Down Switch 765 98 2 3 4 Functions Used - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 488
table shows how to operate all functions of the TV Tuner with the controls on the front panel. Key Power Hot Key Up Down Function TV/Ext Function Turns on the TV Tuner. This key is used only when devices such as VCR, video camera recorder, laser disk, and so on. 478 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 489
the LCD. The changed values are automatically saved when you return to the "TV Channel" On-Screen message. The values are not saved when you power-off the TV Tuner without returning to this message. Message on LCD (xx) COL TNT BRT CNT --LO HI D3S DON Parameter TV Channel By - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 490
the computer and start the ThinkPad Features program. 2. Select the Power icon; then move the pointer to Internal Serial Port (or Diskette Drive Compartment) under the Power for devices and click the button to check mark it. 3. Press the OK button. * Trademark of the IBM Corporation. ** Trademark of - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 491
the TV Tuner is not supplied. (See "Power-on the TV Tuner" on page 480.) The wall outlet from the outdoor antenna is not active. The video or antenna cable is not connected correctly. Antenna elements of the active antenna unit are not adjusted. The batteries in the active antenna unit are not - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 492
482 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 493
Common Parts Listing This section contains FRUs common to most IBM portable, laptop, and notebook computers. External Diskette Drives 5.25-Inch Kit (for 92F0084) (no cleaning necessary, Test Disk, CD Caddy) Signal Cable Power Cable Remote ID Switch Cable (3510) Audio Card, Cable, Screws (3510) CD - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 494
Model 3510) 92F0167 38F8647 38F8646 85F0022 85F0021 38F8681 38F8682 92F0167 92F0269 92F0268 External Keyboard/Mouse Keyboard Cable Mouse Mouse Ball and Pop-Off Retainer Mouse Ball and Twist-Off 1391411 1391412 1395881 1395882 1393286 1391406 1396790 1392090 1393669 484 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 495
1392034 6447047 6447048 6447049 1392028 1392029 6447050 1392035 1392030 1392031 6447046 6447045 Japanese Keyboard Type 2 (106 Key, DBCS Support) Japanese Keyboard Keyboard Cable 94X1110 94X1147 Space-Saving Keyboards (84/85 Key) Country Canadian French Spanish/Latin U.S. English Cable Assembly - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 496
Display Power Cords 1 6 2 7 3 8 4 9 5 10 Index Country 1 Colombia, U.S., Venezuela Colombia, U.S., Venezuela 2 Hong Kong, Singapore, U.K. 3 France, Germany, Spain 4 6952300 62X1045 14F0033 13F9979 14F0069 13F9940 13F9997 14F0087 14F0015 14F0051 1838574 79F2755 486 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 497
Element Exchange Displays 8503 12-Inch Monochrome Display 110/120 V ac 220/240 V ac (No. Hemisphere) 220/240 V ac (So. Hemisphere) Tilt/Swivel Stand 68X3045 68X3046 72X7878 68X3061 8504 12-Inch Monochrome Display 110/120 or 220/240 V ac (Universal) 220/240 V ac (No. Hemisphere) 220/240 V ac (So. - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 498
488 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 499
ADP Alt ANSI ARTIC ASCII AT AVC BIOS bps BPS CCITT CCS CCSB CCSB CD CDPD CD-ROM CE CRC CRT CSD CGA CRC CRT CSA CSD DASD DMA DRAM ECA ECC EGA ESD ESDI EEPROM Load Initial Program Load International Organization for Standardization Integrated-Services Digital Network © Copyright IBM Corp. 1995 489 - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 500
Non-Maskable Interrupt National Support Center Non Volatile assigned device number) Software Product Description Service Representative Static Random Access Memory Super for the Deaf Thin-Film Transistor ThinkPad File Underwriters Laboratory Video Capture Adapter to Video) 490 IBM Mobile Systems HMM - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 501
fax it to IBM HMM Survey at 919-543-8167 (USA). Name Phone Number 1. Do you like this manual? Yes No 2. What would you like to see added, changed, or deleted in this manual? 3. What is your service experience level? Less than five years More than five years 4. Which ThinkPad systems do you - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 502
of hardware technical references that provide in-depth information about IBM personal computer products. Our Technical Reference Library includes information about parallel and serial port controllers, keyboards and keystrokes, SCSI, DMA, video, and more) Specific Personal System/2 systems (including - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 503
software combinations that can be encountered, use the following information to assist you in problem determination. If possible, have this information available when requesting assistance from Service Support and Engineering functions. Machine type and model Processor or hard disk upgrades Failure - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 504
IBM Customer Engineer Technical Support IBM National Support Center IBM PartnerLink Technical Support IBM Part Number ID and Look Up IBM Software Defect Support (CSDs) IBM Software Ordering (publications) IBM Supplies Technical Hotline IBM Warranty Claims Center OS/2 Replacement Diskettes (problems - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 505
Prodigy** Service (link problems) Prodigy User Questions PS/2 Trade-In Program PS/2 Loan for Learning PS/2 Lease from IBM Credit Solution Technical Services, Boca Raton (fee) Technical Support (typewriters/printers) Technical Solutions Magazine IBM Canada Customer and Servicer Support Number - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 506
Warranty Service, Customer Helpline Warranty Claim Fulfillment Warranty Claim Reimbursement Warranty Claim Reimbursement Warranty Claim Parts Inquiry Warranty Provider Support Hotline Warranty Provider Support - Toronto Warranty Service, ThinkPad * Trademark of the IBM Corporation. 496 IBM Mobile - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 507
IBM operates. Any reference to an IBM product, program, or service is not intended to state or imply that only that IBM product, program, or service may be used. Subject to IBM System/2 PS/Note Skill Dynamics ThinkPad TrackPoint II AT HelpCenter HelpLearn IBM OS/2 PS/2 Portmaster SystemXtra - Lenovo ThinkPad 370 | Hardware Maintenance Manual - Page 508
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 |
 |
This Manual Supports:
ThinkPad 340x
(2610)
ThinkPad 355x
(2619)
ThinkPad 360x
(2620)
ThinkPad 370x
(9545)
ThinkPad 700x
(9552)
ThinkPad 701x
(2630)
ThinkPad 720x
(9552)
ThinkPad 750x
(9545)
ThinkPad 755x
(9545)
S82G-1502-03
IBM Mobile Systems
Hardware Maintenance Manual
Volume 2:
ThinkPad Computers
April 1995
We Want Your Comments!
(Please see page 491)