Lenovo ThinkPad T431s Hardware Maintenance Manual
Lenovo ThinkPad T431s Manual
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- Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 1
Hardware Maintenance Manual ThinkPad T431s - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 2
and the product it supports, be sure to read the general information under Appendix A "Notices" on page 91. Second Edition (April 2013) © Copyright Lenovo 2013. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration "GSA" contract, use - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 3
guide 24 Lenovo Solution Center 24 Quick test programs 24 UEFI diagnostic program 25 Bootable diagnostic programs 25 Power system checkout 26 Checking the ac power adapter 26 Checking the built-in battery and operational charging 27 Checking the backup battery 27 Chapter 4. Related service - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 4
1040 M.2 wireless WAN card 60 1050 Memory module 61 1060 Backup battery 62 1070 Battery pack 63 1080 Keyboard 64 1090 Thermal fan assembly 68 1100 Hard disk drive or solid-state drive sub card 70 1110 Speaker assembly 70 1120 System board and media card reader slot . . 72 1130 Fingerprint - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 5
this manual This manual contains service and reference information for the following ThinkPad® products. ThinkPad T431s Machine types (MT) 20AA, 20AC Use this manual along with the advanced diagnostic tests to troubleshoot problems. Important: This manual is intended only for trained service - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 6
iv Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 7
service a ThinkPad notebook computer. • "General safety" on page 1 • "Electrical safety" on page 1 • "Safety inspection guide the weight of the object equally between your feet. 3. Use a slow lifting working on electrical equipment. Important: Use only approved tools and test equipment. Some hand - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 8
power, if necessary. - Use only one hand when working with powered-on electrical equipment; keep the other hand you work with very high voltages; Instructions for these and service technicians from injury. This guide addresses non-ThinkPad features or options not covered by this inspection guide. If - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 9
ground. b. The power cord should be the authorized type specified for your computer. Go to: http://www.lenovo.com/serviceparts-lookup c. Insulation must not be frayed or worn. 4. Check for cracked or bulging batteries. 5. Remove the cover. 6. Check for any obvious non-ThinkPad alterations. Use good - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 10
working on a double-insulated or battery-operated system, use an ESD common ground or reference point. You can use coax or connector-outside shells on these systems. - Use the round ground prong of the ac plug on ac • Spanish • Traditional Chinese DANGER DANGER DANGER 4 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 11
DANGER DANGER DANGER DANGER DANGER Chapter 1. Safety information 5 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 12
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PERIGO PERIGO PERIGO PERIGO PERIGO Chapter 1. Safety information 7 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 14
PERIGO PERIGO PERIGO DANGER DANGER 8 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 15
DANGER DANGER DANGER DANGER DANGER DANGER Chapter 1. Safety information 9 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 16
VORSICHT VORSICHT VORSICHT VORSICHT 10 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 17
VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1. Safety information 11 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 18
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Chapter 1. Safety information 13 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 20
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Chapter 1. Safety information 15 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 22
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Chapter 1. Safety information 17 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 24
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fixes, drivers, and UEFI BIOS, go to http://www.lenovo.com/ThinkPadDrivers and follow the instructions on the screen. Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs: • If you are instructed to replace a FRU but the replacement does not correct the problem - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 26
servicing. Strategy for replacing a specific country or hard disk drive, system board, liquid crystal display (LCD), and memory module. To identify the major FRUs for a product, do the following: 1. Go to: http://www.lenovo.com/support 2. Click Warranty & Services. 20 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 27
FRU list for a product. To get the general FRU list for a product, do the following: 1. Go to: http://www.lenovo.com/support 2. Click Parts & Accessories. 3. Follow the instructions on the screen to select product. 4. Click Products and Parts Detail. 5. On the PRODUCT AND PARTS DETAIL page, click - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 28
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25 - "Bootable diagnostic programs" on page 25 • "Power system checkout" on page 26 Before you go to the checkout guide, be sure to read the following important notes. Important notes: • Only certified trained personnel should service the computer. • Before replacing any FRU, read the entire page on - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 30
ac power adapter on laptop products The following symptoms might indicate damage caused by nonwarranted activities: • Missing parts might be a symptom of unauthorized service or modification. • Check for obvious damage to a hard disk drive. If the spindle of a hard disk drive becomes noisy, the hard - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 31
index" on page 34 for error code descriptions and troubleshooting hints. 2. When the ThinkPad logo is displayed, repeatedly press and release the F10 key. The main screen of the UEFI diagnostic program is displayed. 3. Follow the instructions on the screen to use the diagnostic program. The options - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 32
the backup battery" on page 27 Checking the ac power adapter You are here because the computer fails only when the ac power adapter is used. • If the power problem occurs only when the docking station or the port replicator is used, replace the docking station or the port replicator. 26 Hardware - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 33
is acceptable, replace the system board. Note: Noise from the ac power adapter does not always indicate a defect. Checking the built-in battery and operational charging This computer supports only batteries specially designed for this specific system and manufactured by Lenovo or an authorized - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 34
. Wire Red Black Voltage (V dc) +2.5 to +3.2 Ground • If the voltage is correct, replace the system board. • If the voltage is not correct, replace the backup battery. • If the backup battery discharges quickly after replacement, replace the system board. 28 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 35
the latest maintenance diskette and the system program service diskette become available, they will be posted on http://www.lenovo.com/support Restoring the factory contents by using the Recovery Disc Set When the main storage drive is replaced because of a failure, no product recovery program is - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 36
instructions on ThinkPad Setup program. Note: After restoring a drive to the factory default settings, you might need to reinstall some device drivers. Using the Windows recovery programs on the Windows 8 operating system The computer you are servicing servicing does not perform well and the problem - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 37
access to the hard disk drive. If no master hard disk password is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master hard disk password, or to recover data from the hard disk drive. The hard disk drive can be replaced for - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 38
passwords or to recover data from the hard disk drive. To put the system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to replace the hard disk drive or solid-state drive with a scheduled fee. To remove a user hard disk password that has been forgotten - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 39
ThinkPad Setup program. The user hard disk password and the master hard disk password have been removed. Power management To reduce power consumption, the computer has three power the battery gauge on the taskbar. 2. Select Power off powered off. • The hard disk drive or solid-state drive is powered - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 40
mode, the following occurs: • The system status, RAM, VRAM, and setup data are stored on the hard disk drive or solid-state drive. • The system is powered off. Note: If the computer enters the hibernation mode while it is docked to the docking station or the port replicator, do not undock it before - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 41
the system board. 0251 System CMOS checksum bad - Default configuration used. 1. Charge the backup battery for more than 8 hours by connecting the ac adapter. 2. Replace the backup battery and run ThinkPad Setup to reset the time and date. 0271 Real-Time Clock Error. Check Date and Time settings - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 42
board. Error messages Table 3. Error messages Symptom or error Fan error. Thermal sensing error. The battery installed is not supported by this system and will not charge. Please replace the battery with the correct Lenovo battery for this system. Press the ESC key to continue. This system does not - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 43
defective pixels, it will be deemed as defective by Lenovo and it should be replaced. Notes: • This policy applies to all ThinkPad notebooks purchased on 1 January, 2008 or later. • Lenovo will not provide warranty replacement if the LCD is within specifications because we cannot guarantee that any - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 44
of the following devices: a. Non-ThinkPad devices b. Devices attached to the docking station or the port replicator c. Printer, mouse, and other external devices d. Battery pack e. Hard disk drive or solid-state drive f. External diskette drive or optical drive g. Memory module h. PC cards 4. Turn - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 45
indicators This chapter presents the status indicators that show the status of the computer. 2 3 4 5 6 Table 7. Status indicators Indicator 1 Speaker mute indicator 2 Microphone mute indicator 3 Camera status indicator Meaning On: The speakers are muted. On: The microphones are muted. On: The - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 46
indicator Blinking three times: The computer is initially connected to power. On: The computer is in use. Off: The computer is off or in hibernation mode. Slow blinking: The computer is in sleep mode. 5 Fn Lock press the Fn key and the corresponding function key. 40 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 47
a conventional keyboard. Has the same function as the SysRq key on a conventional keyboard. Has the same function as the ScrLK key on a conventional keyboard. © Copyright Lenovo 2013 41 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 48
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. Front view 2 12 1 Camera (on some models) 2 Microphones 3 Power button 4 Security keyhole 5 Fan louvers 10 9 3 4 5 6 7 8 6 Mini DisplayPort connector 7 Always On USB 3.0 connector 8 Fingerprint reader (on some models) 9 TrackPoint® pointing stick 10 Touch pad © Copyright Lenovo 2013 43 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 50
models) 2 Combo audio jack 3 Media card reader slot 4 USB 3.0 connector Bottom view 1 2 3 4 8 5 6 7 5 VGA connector 6 Ethernet connector 7 Power connector 8 SIM card tray 4 1 2 3 1 Speakers 2 Emergency reset hole 3 Docking station connector 4 Fan louvers 44 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 51
replacement CRU. See your Lenovo Limited Warranty documentation for full details. ThinkPad computers contain the following types of CRUs: - Self-service CRUs: These CRUs unplug or are held by no more than two screws. Examples of these types of CRUs include the ac power adapter, power cord, and hard - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 52
LED and power button board 5 Fingerprint reader bracket 6 Fingerprint reader 7 Thermal fan assembly 8 Memory module 9 Hard disk drive or solid-state drive 10 Hard disk drive bracket 11 SIM card tray 12 Base cover assembly 46 Hardware Maintenance Manual 1 2 3 4 5 6 7 8 9 10 11 12 Self-service CRU - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 53
Table 9. Major FRUs (continued) No. FRU descriptions 13 Battery pack 14 Hard disk drive or solid-state drive sub card 15 Backup battery 16 M.2 wireless WAN card 17 M.2 wireless LAN card 18 Media card reader slot 19 System board 20 VGA connector 21 VGA connector bracket 22 Clickpad - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 54
FRUs No. FRU descriptions 1 LCD bezel assembly 2 Hinge kit 3 Integrated camera and microphone combo card 4 Antenna kit 5 LCD rear cover assembly 6 (2) • Spec Screw pack: • Screw pack • Spec 48 Hardware Maintenance Manual 1 2 3 4 Self-service CRU No No No No No No No No Optional service CRU No - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 55
FRU descriptions ac adapter Power cord Dock adaptor PCH bracket Self-service CRU Yes Yes No No Optional service CRU No No No No Looking up FRU information For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to: http://www.lenovo.com/serviceparts - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 56
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this Hardware Maintenance Manual. An electronic version of this manual can be found at http://www.lenovo.com/support. Click Guides & Manuals and then follow the on-screen instructions to find the manual for your product. You might be required to return the defective part that is replaced by the CRU - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 58
the life of the computer. If you replace the system board, you must restore the serial number of the system unit to its original value. Before replacing the system board, save the original serial number by doing the following: 1. Install the latest version of LENOVO ThinkPad Hardware Maintenance - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 59
date from EEPROM, and follow the instructions on the screen. After an ECA has been applied to the machine, the EEPROM must be updated to reflect the ECA's application. Use the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key to update the EEPROM. Note: Only the ECA - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 60
If the system board is being replaced, try to read the ECA information from the old system board and transfer the information to the new system. If the system board is inoperable, this will not be possible. 54 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 61
and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual is available for downloading at http://www.lenovo.com/support. You - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 62
built-in battery Before replacing any FRU, ensure that you have disabled the built-in battery by doing the following: 1. Turn off your computer and disconnect the ac power adapter and all cables from the computer. 2. Turn on your computer. Press F1 to enter ThinkPad Setup when the ThinkPad logo is - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 63
new base cover FRU is shipped with a kit containing labels of several kinds. Apply those labels when you replace the base cover. For the labels that are not shipped with the new base cover, peel them from the 3 19 18 17 16 15 4 5 7 6 14 8 9 10 11 12 13 Chapter 9. Removing or replacing a FRU 57 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 64
label 14 Hard disk drive or solid-state drive For access, remove this FRU: • "1010 Base cover" on page 57 Attention: • Do not drop the drive or apply any physical shock to it. The drive drive while the system is operating or in suspend mode. Removal steps of the hard disk drive or solid-state drive - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 65
2 3 3 3 3 When installing: Ensure that the hard disk drive or solid-state drive is firmly attached. 1030 M.2 wireless LAN card For access, remove this FRU: • "1010 Base cover" on page 57 Chapter 9. Removing or replacing a FRU 59 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 66
connector labeled AUX or 2 on the card. 1040 M.2 wireless WAN card For access, remove this FRU: • "1010 Base cover" on page 57 60 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 67
the red cable into the connector labeled MAIN on the card; and plug the blue cable into the connector labeled AUX on the card. 1050 Memory module For access, remove this FRU: • "1010 Base cover" on page 57 Chapter 9. Removing or - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 68
the memory module is firmly installed in the slot and does not move easily. 1060 Backup battery For access, remove this FRU: • "1010 Base cover" on page 57 DANGER Use only the authorized battery specified for your computer. Any other battery could ignite or explode. 62 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 69
or damage arising out of their use. The Lenovo Solution Center program provides an automatic battery diagnostic test that determines if the battery pack is defective. A battery pack FRU should not be replaced unless this diagnostic test shows that the battery is defective. The only exception to this - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 70
1 Screw (quantity) M2 × 3 mm, small-head, nylon-coated (4) When installing: Ensure that the battery pack connector is attached firmly. 3 Color Silver Torque 0.181 Nm (1.85 kgf-cm) 1080 Keyboard Removal steps to slide the keyboard forward by 2.5mm (0.1 inch). 64 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 71
1 Use the cross end of the multi-tool to loosen the screws. 2 4 3 Chapter 9. Removing or replacing a FRU 65 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 72
5 6 7 8 Installation steps of keyboard Attach the connectors and then turn over the keyboard. 4 3 2 1 0 5 0 Insert the keyboard into the keyboard bezel as shown. Ensure that the front edge of the keyboard is under the frame of the keyboard bezel. 6 66 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 73
keyboard bezel. Note: Do not press and hold the keys while sliding the keyboard frame, otherwise the keyboard frame cannot be moved. Chapter 9. Removing or replacing a FRU 67 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 74
Base cover" on page 57 Removal steps of the thermal fan assembly Loosen the screws 1 in ascending alphabetical order (a to d) as illustrated. 68 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 75
an amount of 0.2 grams, on the part marked a as in the following illustration. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component. • Ensure that the fan connector is attached firmly. Chapter 9. Removing or - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 76
Removal steps of the hard disk drive or solid-state drive sub card 1 1 1 2 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (3) 1110 Speaker assembly For access, remove this FRU: • "1010 Base cover" on page 57 Color Silver Torque 0.181 Nm (1.85 kgf-cm) 70 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 77
Black Torque 0.181 Nm (1.85 kgf-cm) 0.181 Nm (1.85 kgf-cm) 4 4 4 4 When installing: Ensure that the cables are routed as shown. Chapter 9. Removing or replacing a FRU 71 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 78
"1010 Base cover" on page 57 • "1020 Hard disk drive or solid-state drive" on page 58 • "1030 M.2 wireless LAN card" on page 59 • "1040 M.2 wireless WAN card" on page 60 • "1050 Memory module" on page 61 • "1060 Backup battery" on page 62 • "1070 Battery pack" on page 63 • "1090 Thermal fan assembly - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 79
(1) Color Black Torque 0.181 Nm (1.85 kgf-cm) The following components soldered on the top side of the system board is extremely sensitive. When you service the system board, avoid any kind of rough handling. a CPU b Platform Controller Hub (PCH) b a Chapter 9. Removing or - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 80
, nylon-coated (2) M2 × 2.5 mm, flat-head, nylon-coated (1) Color Silver Black Torque 0.181 Nm (1.85 kgf-cm) 0.181 Nm (1.85 kgf-cm) 74 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 81
"1010 Base cover" on page 57 • "1020 Hard disk drive or solid-state drive" on page 58 • "1030 M.2 wireless LAN card" on page 59 • "1040 M.2 wireless WAN card" on page 60 • "1050 Memory module" on page 61 • "1060 Backup battery" on page 62 • "1070 Battery pack" on page 63 • "1090 Thermal fan assembly - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 82
the DC-in cable assembly Color Silver Torque 0.181 Nm (1.85 kgf-cm) 1 When installing: Ensure that the connector is attached firmly. 76 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 83
board For access, remove these FRUs: • "1010 Base cover" on page 57 • "1090 Thermal fan assembly" on page 68 Removal steps of the LED and power button board 1 2 Color Silver Torque 0.181 Nm (1.85 kgf-cm) When installing: Ensure that the connector is attached firmly. Chapter 9. Removing or - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 84
steps of the LCD unit Color Silver Torque 0.181 Nm (1.85 kgf-cm) 1 2 3 When installing: Ensure that the connectors are attached firmly. 78 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 85
4 4 4 4 Step 4 Screw (quantity) M2.5 × 4 mm, flat-head, nylon-coated (4) 5 Color Black Torque 0.392 Nm (4.0 kgf-cm) 5 6 6 6 6 6 6 Chapter 9. Removing or replacing a FRU 79 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 86
to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. 1170 Clickpad For access, remove these FRUs: • "1010 Base cover" on page 57 • "1070 Battery pack" on page 63 Removal steps of the clickpad 3 3 3 3 3 1 2 Step 3 Screw (quantity) M2 × 2 mm - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 87
4 5 1180 Smart card bezel For access, remove these FRUs: • "1010 Base cover" on page 57 • "1070 Battery pack" on page 63 Removal steps of the smart card bezel When installing: Ensure that the connector is attached firmly. 1 2 Chapter 9. Removing or replacing a FRU 81 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 88
• "1010 Base cover" on page 57 • "1020 Hard disk drive or solid-state drive" on page 58 • "1030 M.2 wireless LAN card" on page 59 • "1040 M.2 wireless WAN card" on page 60 • "1050 Memory module" on page 61 • "1060 Backup battery" on page 62 • "1070 Battery pack" on page 63 • "1080 Keyboard" on page - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 89
Torque 0.392 Nm (4.0 kgf-cm) 2 3 2010 LCD bezel assembly For access, remove these FRUs in order: • "1010 Base cover" on page 57 Chapter 9. Removing or replacing a FRU 83 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 90
page 59 • "1040 M.2 wireless WAN card" on page 60 • "1160 LCD unit" on page 78 • "2010 LCD bezel assembly" on page 83 84 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 91
page 59 • "1040 M.2 wireless WAN card" on page 60 • "1160 LCD unit" on page 78 • "2010 LCD bezel assembly" on page 83 Chapter 9. Removing or replacing a FRU 85 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 92
× 2.5 mm, big-head, nylon-coated (6) Color Silver Torque 0.181 Nm (1.85 kgf-cm) 2 2 2040 Integrated camera and microphone combo card and LED cable assembly For access, remove these FRUs in order: • "1010 Base cover" on LCD panel and LCD cable assembly" on page 84 86 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 93
Removal steps of the integrated camera and microphone combo card 1 2 When installing: Ensure that the connector is attached firmly. 3 Chapter 9. Removing or replacing a FRU 87 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 94
2010 LCD bezel assembly" on page 83 • "2020 LCD panel and LCD cable assembly" on page 84 • "2030 Hinge kit" on page 85 • "2040 Integrated camera and microphone combo card and LED cable assembly" on page 86 Removal steps of the antenna kit and LCD rear cover assembly 2 1 1 2 2 2 1 1 1 1 88 - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 95
you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. a b c d Antenna locations a Wireless LAN main antenna (gray) b Wireless WAN main antenna (red) c Wireless WAN auxiliary antenna (blue - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 96
d Wireless LAN auxiliary antenna (black) 90 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 97
operation of any other product, program, or service. Lenovo may have patents or pending patent applications covering life support applications where malfunction may result in injury or death to persons. The information contained in this document does not affect or change Lenovo product specifications - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 98
in the United States, other countries or both: Lenovo ThinkPad TrackPoint Ultrabay Microsoft, Windows, and Windows Server are trademarks of the Microsoft group of companies. Other company, product, or service names may be the trademarks or service marks of others. 92 Hardware Maintenance Manual - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 99
manual Memory Extensible Firmware Interface Electrostatic discharge Field Replaceable Unit General Announce Variant Integrated circuits Liquid Crystal Display Machine type and model Power-on self-test Radio-frequency identification Supervisor password Universally unique identifier © Copyright Lenovo - Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 100
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- Lenovo ThinkPad T431s | Hardware Maintenance Manual - Page 102
Part Number: 0C10894_01 Printed in China (1P) P/N: 0C10894_01 *1P0C10894_01*
Hardware Maintenance Manual
ThinkPad T431s