Lenovo 4177Q5U User Manual

Lenovo 4177Q5U Manual

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  • Lenovo 4177Q5U | User Manual - Page 1
    ThinkPad T420 and T420i Hardware Maintenance Manual
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    Before using this information and the product it supports, be sure to read the general information under Appendix A "Notices" on page 179. First Edition (February 2011) © Copyright Lenovo 2011. LENOVO products, data, computer software, and services have been developed exclusively at private expense
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    guide 29 Diagnostics using PC-Doctor for DOS. . . . 29 Lenovo problems 50 Undetermined problems numbers 60 Restoring the serial number of the system unit 60 Retaining the UUID 60 Reading or writing the ECA information . . . 61 Chapter 8. Removing and replacing a FRU 63 Before servicing ThinkPad
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    bit) DVDs. . . . 174 Windows 7 Home Basic (32 bit) DVDs. . . . 175 Windows 7 Home Premium (32 bit) DVDs . . 176 Windows 7 Home Premium (64 bit) DVDs . . 177 Common service tools 178 Appendix A. Notices 179 Trademarks 180 ii ThinkPad T420 and T420i Hardware Maintenance Manual
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    this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service information" on page 23. © Copyright Lenovo 2011 iii
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    iv ThinkPad T420 and T420i Hardware Maintenance Manual
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    that you need to be familiar with before you service a ThinkPad Notebook. • "General safety" on page 1 • "Electrical safety" on page 2 • "Safety inspection guide" on page 3 • "Handling devices that are . Do not obstruct fan louvers or cover them with labels or stickers. © Copyright Lenovo 2011 1
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    (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can with very high voltages; Instructions for these precautions are in injury and machine damage. • Do not service the following parts with the power on ThinkPad T420 and T420i Hardware Maintenance Manual
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    ThinkPad features or options not covered by this 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 every service task Power off the computer. Disconnect the power
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    specific service requirement computers. Grounding requirements Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician. 4 ThinkPad T420 and T420i Hardware Maintenance Manual
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    replacement, make sure all screws, springs, and 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. DANGER Some standby batteries contain a small
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    materials. DANGER Unless hot swap is allowed for the FRU being replaced, do as follows before removing it: power off the computer, unplug all power cords from electrical outlets, remove the battery pack, and disconnect any interconnecting cables. 6 ThinkPad T420 and T420i Hardware Maintenance Manual
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    PERIGO Chapter 1. Safety information 7
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    sintoma causado pelo fluido surgir após a lavagem. PERIGO Para evitar choque elétrico, não remova a capa plástica que protege a parte inferior da placa inversora. PERIGO 8 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Embora as principais baterias possuam baixa voltagem, uma bateria em curto-circuito ou aterrada pode produzir corrente o bastante para queimar materiais de pessoal ou inflamáveis. PERIGO A menos que uma hot swap seja permitida para a FRU que está sendo substituída, faça o seguinte antes de removê-la
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    et déconnectez tous les câbles d'interconnexion. VORSICHT Bevor nach einem FRU-Austausch der Computer wieder angeschlossen wird, muß sichergestellt werden, daß keine Schrauben, Federn oder andere kann zu Entzündung oder Explosion führen. 10 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Der LCD-Bildschirm besteht aus Glas und kann zerbrechen, wenn er unsachgemäß behandelt wird oder der Computer auf den Boden fällt. Wenn der Bildschirm beschädigt ist und die darin befindliche Flüssigkeit in Kontakt mit Haut und Augen ger
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    laufendem Betrieb nicht erlaubt ist, gehen Sie beim Austausch der FRU wie folgt vor: Schalten Sie den Computer aus, ziehen Sie alle Netzkabel von den Netzsteckdosen ab, entfernen Sie den Akku und ziehen Sie alle miteinander verbundenen Kabel ab. 12 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Chapter 1. Safety information 13
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    14 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Antes de encender el sistema despues de sustituir una FRU, compruebe que todos los tornillos, muelles y demás piezas pequeñas se encuentran en su sitio y no se encuentran sueltas dentro del sistema. Compruébelo agitando el sistema y escuchando los posibles ruidos que provocarían. Las piezas metá
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    : apague el sistema, desconecte todos los cables de alimentación de las tomas de alimentación eléctrica, extraiga la batería y desconecte los cables de interconexión. 16 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Laser compliance statement (multilingual translations) The laser compliance statements in this section are provided in the following languages: • English • Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese Chapter 1. Safety information 17
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    18 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Chapter 1. Safety information 19
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    20 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Chapter 1. Safety information 21
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    22 ThinkPad T420 and T420i Hardware Maintenance Manual
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    this manual. After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before completing the service action. To download software fixes, drivers, and UEFI BIOS, do as follows: 1. Go to http://www.lenovo.com/support. 2. Enter the product number of the computer
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    the data before doing this task. Attention: The drive startup sequence in the computer you are servicing may have been changed. Be extremely careful during write operations such as copying, Symptom-to-FRU Index for the computer you are servicing. 24 ThinkPad T420 and T420i Hardware Maintenance Manual
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    4-digit MT and 3-digit model, where model = a "fixed part number", not "CTO" (Example: 1829-F1U). • PEW can be accessed at the following Web site: http://www.lenovo.com/support/site.wss/document.do?lndocid=LOOK in the Eclaim record under SYSTEM DETAILS. Chapter 2. Important service information 25
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    can be accessed at the following Web site: http://www.lenovo.com/support • To view the key commodities, click Download & Drivers. And then click Parts information. After that click Parts lookup. Type in the model type and serial number. The key commodities will be returned in the eSupport record
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    ThinkPad model that supports the PC-Doctor® for DOS diagnostics program. Some descriptions might not apply to your particular computer. 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
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    FRU was detected 7. Failing FRU name and part number 8. Machine type, model number, and serial number 9. Customer's name and address Note: During the warranty period, the customer may be responsible for repair costs if the computer damage was caused by misuse, accident, modification, unsuitable
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    : http://www.lenovo.com/support To create the PC-Doctor diagnostic CD, follow the instructions on the Web site. For some possible configurations of the computer, PC-Doctor might not run correctly. To avoid this problem, you need to initialize the computer setup by use of the ThinkPad Setup Utility
  • Lenovo 4177Q5U | User Manual - Page 36
    be held down for at least 2 seconds; otherwise, it cannot be sensed. • Video Adapter test supports only the LCD display on the ThinkPad Notebook. If you have an external monitor attached to your computer, detach it before running PC-Doctor for DOS. • To test Digital Signature Chip, the security
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    available at the following Web site: http://web.lenovothinkvantagetoolbox.com/ • To install the latest Lenovo ThinkVantage Toolbox on the computer, click Download Lenovo ThinkVantage Toolbox, and then follow the instructions on the Web site. To run this program, do as follows: Windows 7: While the
  • Lenovo 4177Q5U | User Manual - Page 38
    For additional information about this program, see the Help for the program. 32 ThinkPad T420 and T420i Hardware Maintenance Manual
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    is attached to the ThinkPad Notebook, detach it. 4. Place the computer on a horizontal surface, and run Diagnostics ➙ ThinkPad Devices ➙ HDD Active installed, remove one of them and run Diagnostics ➙ System Memory. 2. If the problem does not recur, return the DIMM to its place, remove the other one,
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    stops after a short time, no service action is necessary. Touch Pad If enabling theTrackPoint does not correct the problem, continue with the following: • Interactive Tests ➙ Mouse If the Touch Pad does not work, check the configuration as specified in the ThinkPad Setup Utility. If the Touch Pad
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    battery pack supplies power when you turn on the computer. If you suspect a power problem, see the appropriate one of the following power supply of pin no.2 of the ac power adapter may different from the one you are servicing. 3. If the voltage is not correct, replace the ac power adapter. 4. If the
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    it. 2. Turn the computer upside down. 3. Remove the battery pack (see "1010 Battery pack" on page 65). 4. Remove the backup battery (see "1100 Backup battery" on page 82). 5. Measure the voltage of the backup battery. See the following figure. 36 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Red (+) Black (-) 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. Chapter 3. General
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    38 ThinkPad T420 and T420i Hardware Maintenance Manual
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    " on page 172. The recovery disc set consists of the user instructions and the following set of DVDs to restore the computer to the original factory configuration. Operating System Recovery Disc (one disc) Applications and Drivers Recovery Disc (one or more discs) Supplemental Recovery Disc This
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    Utility. Note: After restoring a drive to the factory default settings, you might need to reinstall some device drivers. Passwords As many as three passwords may be needed for any ThinkPad Notebook: the power-on password (POP), the hard-disk password (HDP), and the supervisor password (SVP). If
  • Lenovo 4177Q5U | User Manual - Page 47
    is known by the service technician: 1. Turn on the computer. 2. When the ThinkPad logo comes up, immediately press F1 to enter ThinkPad Setup. When the be made available to the service technician, neither Lenovo nor Lenovo authorized service technicians provide any services to reset the user HDPs
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    blank, and press Enter twice. 8. Press F10. 9. Select Yes in the Setup Configuration window. Both user HDP and master HDP will have been removed. 42 ThinkPad T420 and T420i Hardware Maintenance Manual
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    computer To put the computer into screen blank computer is a Windows 7 model, it does not support circumstances, the computer goes into computer enters the power-saving mode automatically. To cause the computer following events, the computer automatically returns from sleep Note: The computer does not
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    is powered off. Note: If the computer enters the hibernation mode while it is the system. To cause the computer to enter hibernation mode, do Pressing Fn+F4 keys. Also, the computer goes into hibernation mode automatically in either is turned on, the computer returns from hibernation mode and
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    , n can be any number. If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not described there, go to "Intermittent problems" on page 50. Note: For a device not supported by diagnostic codes in the ThinkPad Notebooks, see the manual for that device
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    Number are invalid. 2201 Machine UUID is invalid FRU or action, in sequence 1. Run ThinkPad ThinkPad Notebook. 2. Place the ThinkPad Notebook on a horizontal surface. Do not apply any physical shock to the computer. 3. Run Diagnostics ➙ ThinkPad ThinkPad T420 and T420i Hardware Maintenance Manual
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    error. Thermal sensing error. This system does not support batteries that are not genuine Lenovo-made or authorized. This system will continue to boot 3. System board. System board. Replace the battery. Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries
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    starts successfully. If a mini-PCI Ethernet card is installed, confirm that Alert On LAN 2 in ThinkPad Setup Utility is disabled. Three short beeps, pause, three more short beeps, and one short beep. is set. Type the password and press Enter. 48 ThinkPad T420 and T420i Hardware Maintenance Manual
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    LCD for the notebook computer contains many thin-film transistors (TFTs). The presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns. If the LCD you are servicing has two or
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    If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU. 7. If the problem remains, replace the following FRUs one at a time (do not replace a nondefective FRU): a. System board b. LCD assembly 50 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Chapter 5. Status indicators This chapter presents the system status indicators that show the status of the computer. 1 2 6 3 4 5 9 7 © Copyright Lenovo 2011 8 51
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    , the diskette drive, or the drive in the Serial Ultrabay Enhanced device. When this indicator is on, do not put the computer into sleep (standby) mode or turn off the computer. Note: Do not move the system while the green device access light is on. Sudden physical shock could cause drive errors
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    is on and is not in sleep (standby) mode. 7 Numeric lock (On-screen indicator) Note: This indicator blinks when the computer is in sleep mode. By default, when the numeric lock is on, the numeric lock indicator is displayed on the screen. 8 Serial Ultrabay Enhanced device
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    indicator is off: The battery pack of the computer is fully charged or detached. Green: The computer is in sleep (standby) mode. Blinking green: The computer is entering sleep (standby) mode or hibernation mode, or is resuming normal operation. 54 ThinkPad T420 and T420i Hardware Maintenance Manual
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    this combination, a panel for selecting a power plan (power scheme) appears. Fn+F4 Notes: To use this combination of the keys, ThinkPad PM device driver must have been installed on the computer. If you have logged on with an administrator user ID in Windows XP, and you press Fn+F3, the panel for
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    and change the settings. Note: If the computer is an Windows 7 model, it does not support presentation schemes, however the Fn+F7 combination keys, ThinkPad PM device driver must have been installed on the computer. Though the screen fades out immediately after Fn+F12 are pressed, the computer does
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    power adapter. To change the default brightness level, change the settings of the Power Option in the Control Panel or use the Power Manager. The computer display becomes dimmer. Fn+Spacebar Fn+PrtSc Fn+ScrLk Fn+Pause Fn+cursor keys The purpose of this method is to change the brightness level
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    58 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Screw notices Loose screws can cause a reliability problem. In the ThinkPad Notebook, this problem is addressed with special nylon-coated screws that have are tightened firmly. • Ensure torque screw drivers are calibrated correctly following country specifications. © Copyright Lenovo 2011 59
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    , restore the serial number by doing the following: 1. Install the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later and restart the computer. 2. From the main menu, select 1. Set System Identification. 3. Select 1. Add S/N data from EEPROM. Follow the instructions on the screen
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    or later. 1. Insert the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart the computer. 2. From the main menu, select 6. Set ECA Information. 3. To read ECA information, select 2. Read ECA/rework number from EEPROM and follow the instruction. 4. To read box build date
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    62 ThinkPad T420 and T420i Hardware Maintenance Manual
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    service any computer unless you have been trained and certified. An untrained person runs the risk of damaging parts. 2. Before replacing any FRU, review as given in the drawings by the numbers in square callouts. 5. When turning computer, unplug all power cords from electrical outlets Lenovo 2011 63
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    Before servicing ThinkPad T420 and T420i Some models of the ThinkPad T420 and T420i you are servicing might have the SIM card that the customer has installed. If the computer you are servicing has the SIM card, remove it before you start the servicing. To remove the SIM card, you need to remove the
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    to this is if the battery pack is physically damaged or a customer is reporting a possible safety issue. If Lenovo ThinkVantage Toolbox is not installed in the computer, the customer should download this program before a non-physically damaged battery pack is replaced. Note that a physically damaged
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    1020 ExpressCard blank bezel Table 10. Removal steps of ExpressCard blank bezel When you press the ExpressCard blank bezel 1 , it pops out 2 . 1 2 When installing: Make sure that the bezel is correctly oriented as shown in the following figure. 66 ThinkPad T420 and T420i Hardware Maintenance Manual
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    1030 Serial Ultrabay Enhanced device or travel bezel For access, remove this FRU: • "1010 Battery pack" on page 65 Table 11. Removal steps of Serial Ultrabay Enhanced device or travel bezel Holding the bay lock latch in the unlocked position 1 , slide the bay eject latch in the direction shown by
  • Lenovo 4177Q5U | User Manual - Page 74
    . Removal steps of hard disk drive and solid state drive Note: Loosen the screw 1 , but do not remove it. 4 4 1 2 Step 1 Screw (quantity) Capture screw (1) 68 ThinkPad T420 and T420i Hardware Maintenance Manual Color Black Torque 0.181 Nm (1.85 kgfcm)
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    Table 12. Removal steps of hard disk drive and solid state drive (continued) 4 For HDD and HDD rubber rails (9.5mm): 4 For HDD and HDD rubber rails (7.0mm) : 4 3 4 4 Chapter 8. Removing and replacing a FRU 69
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    Table 12. Removal steps of hard disk drive and solid state drive (continued) For SSD and spacers: 4 4 When installing: Make sure that SSD spacers or HDD rubber rails are attached firmly. 70 ThinkPad T420 and T420i Hardware Maintenance Manual
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    1050 DIMM slot cover For access, remove this FRU: • "1010 Battery pack" on page 65 Table 13. Removal steps of DIMM slot cover Note: Loosen the screw 1 , but do not remove it. 2 Chapter 8. Removing and replacing a FRU 71
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    cover" on page 71 Note: Your computer has two DIMM slots: one under the keyboard and another on the underside of the computer. If you install a DIMM in Table 14. Removal steps of DIMM (in the slot on the underside of the computer) 1 2 1 When installing: Insert the notched end of the DIMM into the
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    1070 PCI Express Mini Card for wireless WAN For access, remove these FRUs in order: • "1010 Battery pack" on page 65 • "1050 DIMM slot cover" on page 71 Table 15. Removal steps of PCI Express Mini Card for wireless WAN In step 1 , unplug the jacks by using the removal tool antenna RF connector (P/N:
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    the yellow cable into the jack labeled MAIN, and the blue cable into the jack labeled AUX on the card. If the computer you are servicing is a wireless WAN-ready model and does not have a wireless WAN card, route the antenna cables and secure them with a tape as shown in the following figure
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    1080 Keyboard For access, remove these FRUs in order: • "1010 Battery pack" on page 65 • "1050 DIMM slot cover" on page 71 Table 16. Removal steps of keyboard 1 Step 1 Screw (quantity) M2 × 10 mm, wafer-head, nylon-coated (1) Color Silver Torque 0.181 Nm (1.85 kgfcm) Push down the keyboard a
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    Table 16. Removal steps of keyboard (continued) 2 Lift the keyboard a little in the direction shown by arrow 3 , and then detach the connector 4 . 76 ThinkPad T420 and T420i Hardware Maintenance Manual
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    When installing the keyboard, do as follows: Table 17. Installation steps of keyboard 1. Attach the keyboard connector. 2. Attach the keyboard so that the keyboard edges a are under the frame as shown in the following figure. Chapter 8. Removing and replacing a FRU 77
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    Table 17. Installation steps of keyboard (continued) 3. To make sure that the front edge of the keyboard is housed firmly, gently press the keys with your palms and slightly slide the keyboard toward you until it snaps into position. 78 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Table 17. Installation steps of keyboard (continued) 4. Make sure that the front edge of the keyboard b is attached firmly. b b b 5. Secure the keyboard by tightening the screws from the bottom side of the computer. Chapter 8. Removing and replacing a FRU 79
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    slots: one under the keyboard and another on the underside of the computer. If you install a DIMM in only one of the two slots, install it in the slot located under the keyboard. Table 18. Removal steps of DIMM (in the slot under the keyboard) 80 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Table 18. Removal steps of DIMM (in the slot under the keyboard) (continued) 2 1 3 2 When installing: Insert the notched end of the DIMM into the socket. Press the DIMM firmly, and pivot it until it snaps into place. Make sure that it is firmly fixed in the slot and does not move easily. Chapter 8.
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    71 • "1080 Keyboard" on page 75 Table 19. Removal steps of backup battery DANGER Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode. 82 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Table 19. Removal steps of backup battery (continued) Cable routing: Attach the backup battery and route the cable as shown in the figure below and make sure that the battery connector is attached firmly. Chapter 8. Removing and replacing a FRU 83
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    tool antenna RF connector (P/N: 08K7159), or pick the connectors with your fingers and gently unplug them in the direction of the arrow. Note: Some models might have only two antenna cables. Step 2 Screw (quantity) M2 × 10 mm, wafer-head, nylon-coated (1) Color Silver Torque 0.181 Nm (1.85 kgfcm
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    black cable into the jack marked AUX or A on the card. If the computer you are servicing has three cables, put the white cable in the cable protection tube and secure it with a tape as shown in this figure. • In models with a wireless LAN card that has three antenna connectors, plug the gray
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    of the keyboard bezel assembly. In some models, the Bluetooth daughter card is also attached on the underside of the keyboard bezel assembly. For the models that do not have a Bluetooth daughter 0.181 Nm (1.85 kgfcm) 0.181 Nm (1.85 kgfcm) 86 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Table 21. Removal steps of keyboard bezel assembly, FPC cable, and Bluetooth daughter card (continued) Step 3 4 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (1) Shoulder screw (2) Color Black Black Torque 0.181 Nm (1.85 kgfcm) 0.181 Nm (1.85 kgfcm) Chapter 8. Removing and replacing a
  • Lenovo 4177Q5U | User Manual - Page 94
    Table 21. Removal steps of keyboard bezel assembly, FPC cable, and Bluetooth daughter card (continued) 7 6 When installing: Make sure that the connector is attached firmly. 88 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Table 21. Removal steps of keyboard bezel assembly, FPC cable, and Bluetooth daughter card (continued) 17 17 When installing: Make sure that the connectors are attached firmly. 19 18 Step 13 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (1) Color Black Torque 0.181 Nm (1.85 kgfcm)
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    Table 21. Removal steps of keyboard bezel assembly, FPC cable, and Bluetooth daughter card (continued) 20 When installing: Make sure that the connector is attached firmly. 90 ThinkPad T420 and T420i Hardware Maintenance Manual
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    1130 SmartCard or Contactless SmartCard For access, remove these FRUs in order: • "1010 Battery pack" on page 65 • "1050 DIMM slot cover" on page 71 • "1080 Keyboard" on page 75 • "1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card (BDC-2.1)" on page 86 Table 22. Removal steps of
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    of SmartCard dummy spacer Some models have a SmartCard dummy spacer as a miscellaneous part. For those models, remove the spacer as shown: 1 1 2 Step 1 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (2) 92 ThinkPad T420 and T420i Hardware Maintenance Manual Color Black Torque 0.181 Nm
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    1140 Modem daughter card (MDC) For access, remove these FRUs in order: • "1010 Battery pack" on page 65 • "1050 DIMM slot cover" on page 71 • "1080 Keyboard" on page 75 • "1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card (BDC-2.1)" on page 86 Table 24. Removal steps of modem
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    86 Table 25. Removal steps of speaker assembly 1 1 1 Step 1 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (3) Color Black Torque 0.181 Nm (1.85 kgfcm) 94 ThinkPad T420 and T420i Hardware Maintenance Manual
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    Table 25. Removal steps of speaker assembly (continued) 3 2 3 When installing: Attach the speaker assembly and route the cable as shown in the following figure, and make sure that the speaker connector is attached firmly. Chapter 8. Removing and replacing a FRU 95
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    page 86 Table 26. Removal steps of LCD unit 1 1 Step 1 Screw (quantity) M2.5 × 6 mm, wafer-head, nylon-coated (2) Color Black Torque 0.392 Nm (4.0 kgfcm) 96 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 103
    Table 26. Removal steps of LCD unit (continued) 2 3 Step 2 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (1) Color Black Torque 0.181 Nm (1.85 kgfcm) Chapter 8. Removing and replacing a FRU 97
  • Lenovo 4177Q5U | User Manual - Page 104
    Table 26. Removal steps of LCD unit (continued) 6 4 Step 6 Screw (quantity) M2.5 × 6 mm, wafer-head, nylon-coated (2) Color Black Torque 0.392 Nm (4.0 kgfcm) 98 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 105
    you route the cables, make sure that they are not subjected to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. Chapter 8. Removing and replacing a FRU 99
  • Lenovo 4177Q5U | User Manual - Page 106
    Table 26. Removal steps of LCD unit (continued) 9 10 10 100 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 107
    96 Table 27. Removal steps of fan assembly Note: Loosen the screws 1a to 1d in order, but do not remove them. For Discrete Graphics models: 2 1a 1d 1c 1b Chapter 8. Removing and replacing a FRU 101
  • Lenovo 4177Q5U | User Manual - Page 108
    of fan assembly (continued) For Integreted Graphics models: 1a 1d 1c 1b Step 1 2 Screw (quantity) Capture shoulder screw (4) M2 × 3 mm, wafer-head, nylon-coated (1) Color Silver black Torque 0.181 Nm (1.85 kgfcm) 0.181 Nm (1.85 kgfcm) 102 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 109
    Table 27. Removal steps of fan assembly (continued) For Discrete Graphics models: 3 4 For Integreted Graphics models: 2 3 Chapter 8. Removing and replacing a FRU 103
  • Lenovo 4177Q5U | User Manual - Page 110
    problem due to imperfect contact with a component. For the fan in the integrated graphics models, you need to peel the thin film off from the thermal rubber marked b . For Discrete Graphics models: For Integrated Graphics models: a b a 104 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 111
    Table 27. Removal steps of fan assembly (continued) • When attaching the fan assembly to the frame, take care not to damage the heat sink a of the fan assembly. • Make sure that the fan connector is attached firmly. Chapter 8. Removing and replacing a FRU 105
  • Lenovo 4177Q5U | User Manual - Page 112
    on page 96 • "1170 Fan assembly" on page 101 Attention: The CPU is extremely sensitive. When you service the CPU, avoid any kind of rough handling. Table 28. Removal steps of CPU Rotate the head of direction shown by arrow 3 to secure the CPU. 106 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 113
    1190 Base cover assembly and DC-in connector cable For access, remove these FRUs in order: • "1010 Battery pack" on page 65 • "1020 ExpressCard blank bezel" on page 66 • "1030 Serial Ultrabay Enhanced device or travel bezel" on page 67 • "1040 Hard disk drive (HDD) and solid state drive (SSD)" on
  • Lenovo 4177Q5U | User Manual - Page 114
    is attached firmly. Color Black Torque 0.181 Nm (1.85 kgfcm) 6 5 When installing: Make sure that the wireless switch is adjusted as shown in callout a . 108 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 115
    Table 29. Removal steps of base cover assembly and DC-in connector cable (continued) 7 Step 7 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (1) Color Black Torque 0.181 Nm (1.85 kgfcm) Chapter 8. Removing and replacing a FRU 109
  • Lenovo 4177Q5U | User Manual - Page 116
    tag 19 Serial number label 20 Product label 21 China wireless WAN label 22 China modem label For some models, you need to apply two FCC labels. Check the old base cover; if it has two FCC labels, apply both to the new base cover. 110 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 117
    For the location of each label, refer the following figure: 1 23 4 5 67 22 21 8 9 10 20 19 18 13 17 14 12 11 16 15 Chapter 8. Removing and replacing a FRU 111
  • Lenovo 4177Q5U | User Manual - Page 118
    30. Removal steps of magnesium structure frame 1 2 2 3 3 5 Step 2 3 Screw (quantity) M2 × 5 mm, wafer-head, nylon-coated (2) M2 × 8 mm, wafer-head, nylon-coated (2) 112 ThinkPad T420 and T420i Hardware Maintenance Manual 4 4 Color Black Black Torque 0.181 Nm (1.85 kgfcm) 0.181 Nm (1.85 kgfcm)
  • Lenovo 4177Q5U | User Manual - Page 119
    Table 30. Removal steps of magnesium structure frame (continued) 4 Hex stud, nylon-coated (2) Silver 0.392 Nm (4.0 kgfcm) Chapter 8. Removing and replacing a FRU 113
  • Lenovo 4177Q5U | User Manual - Page 120
    to the computer while the test is running. Table 31. Removal steps of system board and ExpressCard slot assembly The following components soldered on the top side of the system board are extremely sensitive. When you service the system board, avoid any kind of rough handling. 114 ThinkPad T420 and
  • Lenovo 4177Q5U | User Manual - Page 121
    chip for the HDD Active Protection System c Platform Controller Hub (PCH) d Graphic Processing Unit (GPU) (Discrete graphics chip) Note: The GPU d is only for models with switchable graphics. Models with integrated graphics do not have a GPU on the system board. For Switchable Graphics
  • Lenovo 4177Q5U | User Manual - Page 122
    (quantity) M2 × 3 mm, wafer-head, nylon-coated (1) Color Black Torque 0.181 Nm (1.85 kgfcm) 2 When installing: Make sure that the connector is attached firmly. 116 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 123
    2010 LCD bezel assembly For access, remove the following FRU: • "1010 Battery pack" on page 65 Table 32. Removal steps of LCD bezel assembly 2 1 1 1 1 1 1 Chapter 8. Removing and replacing a FRU 117
  • Lenovo 4177Q5U | User Manual - Page 124
    117 Table 33. Removal steps of LED board 1 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (1) Color Silver Torque 0.181 Nm (1.85 kgfcm) 118 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 125
    Table 33. Removal steps of LED board (continued) When installing: Make sure that the connector is attached firmly. Chapter 8. Removing and replacing a FRU 119
  • Lenovo 4177Q5U | User Manual - Page 126
    117 Table 34. Removal steps of integrated camera 1 Step 1 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (1) Color Black Torque 0.181 Nm (1.85 kgfcm) 120 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 127
    Table 34. Removal steps of integrated camera (continued) 2 Chapter 8. Removing and replacing a FRU 121
  • Lenovo 4177Q5U | User Manual - Page 128
    . Removal steps of LCD panel and LCD cable 1 4 1 1 1 5 3 2 Step 1 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (4) Color Black Torque 0.181 Nm (1.85 kgfcm) 122 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 129
    Table 35. Removal steps of LCD panel and LCD cable (continued) When installing: When attaching the LCD panel to the cover, gently press the left and right edges covered with metal. DO not press the surface of the panel or apply any excessive force to the panel. 7 6 When installing: Make sure that
  • Lenovo 4177Q5U | User Manual - Page 130
    page 118 • "2030 Integrated camera" on page 120 • "2040 LCD panel and LCD cable" on page 122 Table 36. Removal steps of camera cable 1 1 1 1 1 124 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 131
    you route the cables, make sure that they are not subjected to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. Chapter 8. Removing and replacing a FRU 125
  • Lenovo 4177Q5U | User Manual - Page 132
    Table 37. Removal steps of wireless LAN antenna assembly or wireless LAN/WAN antenna assembly (continued) 3 3 4 4 Step 3 Screw (quantity) M2 × 3 mm, flat-head, nylon-coated (2) Color Black Torque 0.181 Nm (1.85 kgfcm) 5 5 126 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 133
    2070 Hinges and LCD rear cover assembly For access, remove these FRUs in order: • "1010 Battery pack" on page 65 • "1020 ExpressCard blank bezel" on page 66 • "1050 DIMM slot cover" on page 71 • "1070 PCI Express Mini Card for wireless WAN" on page 73 • "1080 Keyboard" on page 75 • "1110 PCI Express
  • Lenovo 4177Q5U | User Manual - Page 134
    Table 38. Removal steps of hinges and LCD rear cover assembly (continued) 128 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 135
    Chapter 9. Locations This chapter presents the locations of ThinkPad T420 and T420i hardware components. Front view 1 Integrated camera (for some models) 2 ThinkLight 3 Built-in microphone 4 Built-in each indicator, see Chapter 5 "Status indicators" on page 51. © Copyright Lenovo 2011 129
  • Lenovo 4177Q5U | User Manual - Page 136
    21 20 19 18 5 31 23 16 15 14 17 13 4 12 11 5 6 7 98 10 130 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 137
    Rear view 1 Status indicators Note: For the description of each indicator, see Chapter 5 "Status indicators" on page 51. 2 SmartCard slot 3 DisplayPort connector 4 USB connector 5 RJ-45 (Ethernet) connector 6 External monitor connector 7 Power jack 8 USB connector 9 Modem
  • Lenovo 4177Q5U | User Manual - Page 138
    Bottom view 1 Battery pack 2 Battery pack latch 3 DIMM slot 4 Docking connector 5 LCD cover latch 6 Serial Ultrabay Enhanced lock latch 7 Serial Ultrabay Enhanced eject latch 7 6 1 2 3 4 5 132 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 139
    be used for all of these models, unless specific country or region service CRU; two asterisks (**) means that the part is an Optional-service CRU. ThinkPad Notebooks contain the following types of CRUs: Self-service Optional-service CRUs These CRUs are isolated parts within the computer that
  • Lenovo 4177Q5U | User Manual - Page 140
    Overall 1 32 31 30 29 28 2 27 a 26 25 24 23 b 22 c 21 3 20 4 19 5 18 17 16 15 6 14 13 7 8 12 9 6 11 134 ThinkPad T420 and T420i Hardware Maintenance Manual 10
  • Lenovo 4177Q5U | User Manual - Page 141
    Table 39. Parts list-Overall No. FRU (Overall) a See "Miscellaneous parts" on page 167. g FRU no. 1 LCD unit (see "LCD FRUs" on page 154.) 2 Keyboard bezel assembly without fingerprint reader • 4177-CTO, 25x, 26x, 28x, Q5x, QDx, QFx • 4178-CTO, 56x, 57x, 58x, 59x, 9Fx, 9Gx, 9Hx, 9Nx, 9Rx • 4179-
  • Lenovo 4177Q5U | User Manual - Page 142
    -CTO 75Y5117 5 Travel cover • 4177-CTO, Q7x, QDx, QFx • 4178-CTO • 4179-CTO • 4180-CTO, LPx, LQx • 4236-CTO, NDx, NEx 60Y5512 CRU ID * * * * 136 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 143
    Table 39. Parts list-Overall (continued) No. FRU (Overall) FRU no. 6 1-GB DDR3-1333 SDRAM SO-DIMM (PC3-10600) card 55Y3715 • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, Q2x, Q3x, Q4x, Q5x, Q7x, Q8x, QAx, QBx, QCx, QDx
  • Lenovo 4177Q5U | User Manual - Page 144
    • 4177-CTO, 2Dx, QDx, QEx • 4178-CTO, 9Fx, 9Gx, 9Hx, 9Jx, 9Kx, 9Lx, 9Mx, 9Nx • 4179-CTO • 4180-CTO • 4236-CTO 42T4885 CRU ID ** N N * * 138 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 145
    Table 39. Parts list-Overall (continued) No. FRU (Overall) FRU no. 8 Battery pack, Li-ion (6-cell) 55+ 42T4791 • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, Q2x, Q5x, Q8x, QAx, QCx • 4178-CTO, 52x, 53x, 54x, 55x, 56x, 57x,
  • Lenovo 4177Q5U | User Manual - Page 146
    ++ • 4177-CTO, Q3x, Q4x, Q7x, QBx, QFx • 4178-CTO, 58x • 4179-CTO • 4180-CTO, 65x, KZx, MAx, MFx • 4236-CTO, 65x 42T4912 CRU ID * * * * * * 140 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 147
    Table 39. Parts list-Overall (continued) No. FRU (Overall) FRU no. 9 Base cover assembly 04W1626 • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, Q2x, Q3x, Q4x, Q5x, Q7x, Q8x, QAx, QBx, QCx, QDx • 4178-CTO, 52x, 53x,
  • Lenovo 4177Q5U | User Manual - Page 148
    , G4x, G5x, G6x, G7x, G8x, G9x • 4180-CTO, KWx, LEx, LNx, LUx, M7x, MAx • 4236-CTO, N2x, N6x, NCx 142 ThinkPad T420 and T420i Hardware Maintenance Manual FRU no. 60Y3239 CRU ID ** 41V9756 ** 04W1640 ** 45N7217 ** 45N7229 ** 45N7305 ** 45N7285 ** 42T1153 ** 42T1167 ** 45N7219 **
  • Lenovo 4177Q5U | User Manual - Page 149
    Table 39. Parts list-Overall (continued) No. FRU (Overall) 12 SATA hard disk drive, 320 GB, 5,400 rpm • 4177-CTO, 22x, 25x, 28x, 2Dx, 2Ex, QDx • 4178-CTO, 5Ax, 5Bx, 5Cx, 5Dx, 9Vx • 4179-CTO, G2x, G4x, G5x, G6x, G7x, G8x, G9x • 4180-CTO, KWx, LEx, LNx, LUx, M7x, MAx • 4236-CTO, N2x, N6x, NCx 12 SATA
  • Lenovo 4177Q5U | User Manual - Page 150
    , MCx, MGx, MJx • 4236-CTO, 62x, 63x, 64x, N3x, N4x, NHx, NKx, NLx, NNx, MBx FRU no. 42T1157 42T1169 42T1163 45N7255 45N7275 45N7319 42T1159 144 ThinkPad T420 and T420i Hardware Maintenance Manual CRU ID ** ** ** ** ** ** **
  • Lenovo 4177Q5U | User Manual - Page 151
    Table 39. Parts list-Overall (continued) No. FRU (Overall) FRU no. 12 SATA hard disk drive, 320 GB, 7200 rpm • 4177-CTO, 23x, 29x, 2Ax, 2Fx, Q2x, Q4x, Q5x • 4178-CTO, 52x, 53x, 54x, 56x, 58x, 59x, 5Ex, 5Fx, 5Gx, 5Hx, 5Jx, 5Kx, 9Ex, 9Px, 9Qx, 9Rx, 9Ux, 9Wx, 9Xx, 9Yx • 4179-CTO • 4180-CTO, 62x, 63x
  • Lenovo 4177Q5U | User Manual - Page 152
    , 2Gx • 4178-CTO, 9Vx, 9Wx, 9Yx • 4179-CTO • 4180-CTO • 4236-CTO FRU no. 45N8007 45N7981 45N8027 60Y3207 04W1345 04W1346 04W1466 04W1468 CRU ID ** ** ** N N N N N 146 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 153
    Table 39. Parts list-Overall (continued) No. FRU (Overall) FRU no. 14 System board assembly, discrete graphics, AMT, TPM, AES • 4177-CTO, 2Jx, 2Nx, 2Px, Q3x, Q4x, QBx, QFx • 4178-CTO, 54x, 55x, 58x, 5Ex, 5Fx, 5Yx, 5Zx, 99x, 9Ax • 4179-CTO • 4180-CTO, 64x, 65x, KLx, KMx, KNx, KPx, KQx, KRx, KSx,
  • Lenovo 4177Q5U | User Manual - Page 154
    9Ex, 9Jx, 9Rx, 9Xx, 9Yx • 4179-CTO, G7x • 4180-CTO, LTx, M3x • 4236-CTO, NKx 04W0496 16 ThinkPad b/g/n Wireless (1x1 BGN) • 4177-CTO, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx , NHx, NMx, NNx, MBx 60Y3253 CRU ID N N ** ** ** ** 148 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 155
    Table 39. Parts list-Overall (continued) No. FRU (Overall) FRU no. 16 Intel Centrino Ultimate-N 6300 • 4177-CTO, 2Hx, 2Jx, Q8x, QFx • 4178-CTO, 99x, 9Ax, 9Bx, 9Cx • 4179-CTO • 4180-CTO, KGx, KXx, KYx, KZx, L2x, L3x, M5x, M6x • 4236-CTO, N4x, NFx, NGx, NPx, NQx, NRx 60Y3233 16 Intel Centrino
  • Lenovo 4177Q5U | User Manual - Page 156
    , MDx, MEx, MJx • 4236-CTO, 62x, 63x, N2x, N3x, N5x, N6x, N7x, N8x, NCx, NGx, NHx, NKx, NLx, NMx, NNx, MBx 04W0407 CRU ID ** N N N N 150 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 157
    Table 39. Parts list-Overall (continued) No. FRU (Overall) FRU no. 21 Fan assembly, integrated • 4177-CTO, 25x, 26x, 27x, 28x, 29x, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, Q2x, Q5x, Q7x, Q8x, QAx, QCx, QDx, QFx • 4178-CTO, 52x, 53x, 56x, 57x, 59x, 5Ax, 5Bx, 5Cx, 5Dx, 5Jx, 5Kx, 5Lx, 5Mx, 5Nx, 5Px, 5Rx, 5Tx, 5Ux,
  • Lenovo 4177Q5U | User Manual - Page 158
    , NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, MBx 04W1632 27 DIMM slot door 04W1636 28 HDD cover 04W1637 CRU ID N N * N ** ** 152 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 159
    Table 39. Parts list-Overall (continued) No. FRU (Overall) FRU no. 29 Audio sub card • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, Q2x, Q3x, Q4x, Q5x, Q7x, Q8x, QAx, QBx, QCx, QDx • 4178-CTO, 52x, 53x, 54x, 55x, 56x, 57x,
  • Lenovo 4177Q5U | User Manual - Page 160
    "Information about ac power adapters" on page 170.) FRU no. 91P8835 CRU ID N LCD FRUs In ThinkPad T420 and T420i, there are following types of LCDs. • 14.0-inch HD (1366 x 768) LED backlight ) LED backlight Anti-Glare Display" on page 161) 154 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 161
    10 1 2 3 9 8 4 7 5 6 Table 40. Parts list-14.0-inch HD (1366 x 768) LED Backlight Anti-Glare Display No. FRU (14.0-inch HD (1366 x 768) LED backlight Anti-Glare Display) a, See "Miscellaneous parts" on page 167. b FRU no. CRU ID Chapter 10. Parts list 155
  • Lenovo 4177Q5U | User Manual - Page 162
    , M3x, M4x, M5x, M6x, M7x, M9x, MAx, MCx, MGx • 4236-CTO, 62x, 64x, N2x, N3x, N5x, NCx, NDx, NKx, NLx, NMx, NPx, NQx, NRx 156 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 163
    Table 40. Parts list-14.0-inch HD (1366 x 768) LED Backlight Anti-Glare Display (continued) No. FRU (14.0-inch HD (1366 x 768) LED backlight Anti-Glare Display) FRU no. CRU ID 3 LCD module, 14.0-inch HD (1366 x 768) LED backlight Anti-Glare Display 93P5687 N • 4177-CTO, 22x, 23x, 24x, 25x, 26x,
  • Lenovo 4177Q5U | User Manual - Page 164
    , N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, MBx 158 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 165
    Table 40. Parts list-14.0-inch HD (1366 x 768) LED Backlight Anti-Glare Display (continued) No. FRU (14.0-inch HD (1366 x 768) LED backlight Anti-Glare Display) FRU no. CRU ID 5 Wireless antenna (wireless LAN/wirless WAN) 04W1615 N • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx,
  • Lenovo 4177Q5U | User Manual - Page 166
    , N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, MBx 160 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 167
    Table 40. Parts list-14.0-inch HD (1366 x 768) LED Backlight Anti-Glare Display (continued) No. FRU (14.0-inch HD (1366 x 768) LED backlight Anti-Glare Display) FRU no. CRU ID 10 Clear plate kit 04W1620 N • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx
  • Lenovo 4177Q5U | User Manual - Page 168
    , N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, MBx 162 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 169
    Table 41. Parts list-14.0-inch HD+ (1600 x 900) LED backlight Anti-Glare Display (continued) No. FRU (14.0-inch HD+ (1600 x 900) LED backlight Anti-Glare Display) FRU no. CRU ID 4 Hinges 04W1612 N • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx,
  • Lenovo 4177Q5U | User Manual - Page 170
    , N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, MBx 164 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 171
    Table 41. Parts list-14.0-inch HD+ (1600 x 900) LED backlight Anti-Glare Display (continued) No. FRU (14.0-inch HD+ (1600 x 900) LED backlight Anti-Glare Display) FRU no. CRU ID 8 LCD cable 04W1618 N • 4177-CTO, 2Kx, 2Lx, 2Nx, 2Px, Q2x, Q3x, Q8x, QAx, QBx • 4178-CTO, 54x, 55x, 58x, 59x, 5Nx,
  • Lenovo 4177Q5U | User Manual - Page 172
    Traditional Chinese Turkish U.K. English U.S. English U.S. English (International, with a Euro symbol) Netherlands Turkish (F Type) 166 ThinkPad T420 and T420i Hardware Maintenance Manual FRU no. 45N2076 45N2077 45N2075 45N2078 45N2073 45N2072 45N2079 45N2080 45N2097 45N2082 45N2083 45N2084 45N2085
  • Lenovo 4177Q5U | User Manual - Page 173
    Miscellaneous parts Table 43. Parts list-Miscellaneous parts FRU Screw kit: • M2 × 3 mm, black (50) • M2 × 5 mm, black (20) • M2 × 8 mm, black (15) • M2 × 10 mm, Silver (4) • M2 × 15 mm, black (8) • M2.5 × 4 mm, black (8) • M2.5 × 6 mm, black (8) • M2 (shoulder), black (4) • Hex stud, Silver (4)
  • Lenovo 4177Q5U | User Manual - Page 174
    SV GT2 • 1394 cover • Dummy cover, RJ-11 • Plastic support for smart card • Blind sheet for SIM card • SIM dummy Insulation sheet - DC-IN • Bracket - express card • SIM guide bracket sub assy • CPU bracket sub assy • SIM slide spacer ID N N N 168 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 175
    - LCD front bezel • LED lens - LCD front bezel • Shield - EMC • Clear plate - LCD rear cover • LED lens - LCD rear cover • ThinkPad logo • Lenovo logo • LCD latch - right • LCD latch - left • Sponge - center • Sponge - upper • Sponge - lower • Stopper - upper right • Stopper - upper left • Stopper
  • Lenovo 4177Q5U | User Manual - Page 176
    , xxV) 3-pin (90 W, 20 V) adapter (models CTO, xxA, xxB, xxG, xxH, xxK, xxM, xxQ, xxT, xxV) FRU no. 42T5282 42T4423 42T4419 42T4427 42T4431 42T4435 42T4439 CRU ID * FRU no. 42T5283 42T4421 42T4417 42T4425 42T4429 42T4433 45N0068 CRU ID * 170 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 177
    Power cords A ThinkPad power cord for a specific country or region is usually available only in that country or region: Table 46. Parts list-2-pin power cords Country or region Argentina • models -CTO, xxY Brazil • models -CTO, xxP Canada, U.S. • models -CTO, xxF, xxL, xxS, xxU Japan • models -CTO,
  • Lenovo 4177Q5U | User Manual - Page 178
    Recovery discs 172 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 179
    Windows 7 Professional (32 bit) DVDs Windows 7 Professional (32 bit) is preinstalled as the operating system in the following models: • 4177-CTO, QAx, Q7x, QDx • 4178-CTO, 9Qx, 9Px, 9Vx, 9Ux • 4179-CTO, G7x, G3x • 4180-CTO, MFx, LTx, LQx, LPx, LMx, LKx, LHx, LGx,
  • Lenovo 4177Q5U | User Manual - Page 180
    7 Professional (64 bit) DVDs Windows 7 Professional (64 bit) is preinstalled as the operating system in the following models: • 4177-CTO, 2Px, 2Nx, 2Kx, QBx, Q8x, Q5x, 2Cx, 27x, Q4x, Q3x, Q2x, 25x 03W7927 03W7928 03W7929 03W7930 CRU ID 174 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 181
    Windows 7 Home Basic (32 bit) DVDs Windows 7 Home Basic (32 bit) is preinstalled as the operating system in the following models: • 4177-CTO, 2Ex, 24x, 23x, 22x • 4178-CTO, 9Ex, 9Dx • 4179-CTO, G9x, G8x • 4180-CTO, MGx, MAx • 4236-CTO Table 50. Parts list-Windows 7
  • Lenovo 4177Q5U | User Manual - Page 182
    (32 bit) DVDs Windows 7 Home Premium (32 bit) is preinstalled as the operating system in the following models: • 4177-CTO • 4178-CTO • 4179-CTO, G4x • 4180-CTO, LNx • 4236-CTO, NCx (for India) US English 03W7946 03W7947 03W7948 CRU ID 176 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 183
    Windows 7 Home Premium (64 bit) DVDs Windows 7 Home Premium (64 bit) is preinstalled as the operating system in the following models: • 4177-CTO, 2Mx, 2Lx, 2Jx, QFx • 4178-CTO, 9Nx, 9Fx • 4179-CTO • 4180-CTO • 4236-CTO, NRx, NQx, NPx Table 52. Parts list-Windows 7 Home
  • Lenovo 4177Q5U | User Manual - Page 184
    tools Table 53. Parts list-Common service tools Tool Screwdriver kit 1/4" drive spinner handle 1/4" Sq. to 1/4" hex USB floppy diskette drive tool kit Test card for integrated Smart Card LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later Note: Download the file from the following Web
  • Lenovo 4177Q5U | User Manual - Page 185
    and verify the operation of any other product, program, or service. Lenovo may have patents or pending patent applications covering subject matter described document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to
  • Lenovo 4177Q5U | User Manual - Page 186
    other countries or both: Active Protection System Lenovo Rescue and Recovery ThinkLight ThinkPad ThinkVantage TrackPoint Ultrabay IBM (used under license) Other company, product, or service names may be the trademarks or service marks of others. 180 ThinkPad T420 and T420i Hardware Maintenance Manual
  • Lenovo 4177Q5U | User Manual - Page 187
  • Lenovo 4177Q5U | User Manual - Page 188
    Part Number: 0A60007 Printed in China (1P) P/N: 0A60007 *0A60007*
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ThinkPad T420 and T420i
Hardware Maintenance Manual