Lenovo ThinkPad T420 Hardware Maintenance Manual
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Lenovo ThinkPad T420 Hardware Maintenance Manual

Lenovo ThinkPad T420 Hardware Maintenance Manual

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ThinkPad T420 and T420i
Hardware Maintenance Manual

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Summary of Contents for Lenovo ThinkPad T420

  • Page 1 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 2 Appendix A “Notices” on page 167. Fourth Edition (November 2011) © Copyright Lenovo 2011. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.

  • Page 3: Table Of Contents

    Diagnostics using PC-Doctor for DOS..1010 Battery pack ... . . Lenovo ThinkVantage Toolbox ..1020 ExpressCard blank bezel ..
  • Page 4 2070 Hinges and LCD rear cover assembly . . . Trademarks ....Chapter 9. Locations ..ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 5: About This Manual

    This manual contains service and reference information for the following ThinkPad ® products. ThinkPad T420 and T420i Machine Type 4177, 4178, 4179, 4180, 4236, 4237, and 4238 Use this manual along with the advanced diagnostic tests to troubleshoot problems. Important: This manual is intended only for trained service technicians who are familiar with ThinkPad products.
  • Page 6 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 7: Chapter 1. Safety Information

    • Reinstall all covers correctly before returning the machine to the customer. • Fan louvers on the machine help to prevent overheating of internal components. Do not obstruct fan louvers or cover them with labels or stickers. © Copyright Lenovo 2011...

  • Page 8: Electrical Safety

    – Power supply units – Pumps – Blowers and fans – Motor generators – Similar units to listed above This practice ensures correct grounding of the units. • If an electrical accident occurs: ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 9: Safety Inspection Guide

    – Use caution; do not become a victim yourself. – Switch off power. – Send another person to get medical aid. Safety inspection guide The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each machine was designed and built, required safety items were installed to protect users and service technicians from injury.

  • Page 10: Grounding Requirements

    – Use the round ground prong of the ac plug on ac-operated 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 veriied by a certiied electrician. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 11: Safety Notices (Multilingual Translations)

    Safety notices (multilingual translations) The safety notices in this section are provided in the following languages: • English • Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese DANGER Before the computer is powered on after FRU replacement, make sure all screws, springs, and other small parts are in place and are not left loose inside the computer.
  • Page 12 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. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 13 PERIGO Chapter 1 Safety information...
  • Page 14 áreas afetadas imediatamente com água durante pelo menos 15 minutos. Procure cuidados médicos se algum sintoma causado pelo luido surgir após a lavagem. PERIGO Para evitar choque elétrico, não remova a capa plástica que protege a parte inferior da placa inversora. PERIGO ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 15 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 inlamáveis. PERIGO A menos que uma hot swap seja permitida para a FRU que está sendo substituída, faça o seguinte antes de removê-la: desligue o computador, desconecte todos os cabos de energia das tomadas, remova o pacote de baterias e desconecte quaisquer cabos de interconexão.
  • Page 16 Die Batterie kann schwere Verbrennungen oder Verätzungen verursachen. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Bereitschafts-oder Systembatterie nur Batterien des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 17 VORSICHT Akkus enthalten geringe Mengen von Nickel. Sie dürfen nicht zerlegt, wiederaufgeladen, kurzgeschlossen, oder Feuer oder Wasser ausgesetzt 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.
  • Page 18 Wenn ein Austausch der FRU bei 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. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 21 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 metálicas pueden causar cortocircuitos eléctricos.
  • Page 22 Salvo que se permita el intercambio en caliente para la unidad sustituible localmente, realice lo siguiente antes de extraerla: apague el sistema, desconecte todos los cables de alimentación de las tomas de alimentación eléctrica, extraiga la batería y desconecte los cables de interconexión. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 23: Laser Compliance Statement

    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...
  • Page 24 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 25 Chapter 1 Safety information...
  • Page 26 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 27 Chapter 1 Safety information...
  • Page 28 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 29: Chapter 2. Important Service Information

    – “FRU identiication for CTO, CMV, and GAV products” on page 25 Important: Advise customers to contact the Lenovo Customer Support Center if they need any assistance in obtaining or installing any software ixes, drivers, and UEFI BIOS downloads. Telephone numbers forLenovo Support are available at http://www.lenovo.com/support.

  • Page 30: Important Notice For Replacing A System

    1, and assigned drive D:. The mSATA drive is installed in the wireless WAN card slot of the computer. The Lenovo preloaded software is installed on the mSATA drive. Always try to run a low-level format before replacing a hard disk drive. This will cause all customer data on the hard disk to be lost.

  • Page 31: Gav

    Dynamic Conigure To Order (CTO) This provides the ability for a customer to conigure a Lenovo solution from an eSite, and have this coniguration sent to fulillment, where it is built and shipped directly to the customer. The machine label, Product Entitlement Warehouse (PEW), eSupport, and the HMM will load these products as the 4-digit MT and 3-digit model, where model = “CTO”...
  • Page 32 For Key Commodities (Examples - hard disk drive, system board, microprocessor, LCD, and memory) Use the HMM as a back-up to PEW and eSupport to view the complete list of FRUs at the MT Model level. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 33: Chapter 3. General Checkout

    • “Checkout guide” on page 29 – “Diagnostics using PC-Doctor for DOS” on page 29 – “Lenovo ThinkVantage Toolbox” on page 31 – “FRU tests” on page 33 • “Power system checkout” on page 34 The descriptions in this chapter apply to any ThinkPad model that supports the PC-Doctor ®...

  • Page 34: What To Do Irst

    • Missing parts might be a symptom of unauthorized service or modiication. • If the spindle of a hard disk drive becomes noisy, it may have been subjected to excessive force, or dropped. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 35: Checkout Guide

    PC-Doctor. Note: PC-Doctor for DOS is available at the following Web site: http://www.lenovo.com/support To create the PC-Doctor diagnostic CD, follow the instructions on the Web site. For some possible conigurations 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 program before you run PC-Doctor.
  • Page 36 • 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 chip must be set to Active. 10. Run the applicable function test. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 37: Lenovo Thinkvantage Toolbox

    While the Windows operating system is running, press the ThinkVantage button. To start this program, do the following: • Click Start ➙ Control Panel ➙ System and Security ➙ Lenovo – System Health and Diagnostics. Windows Vista and Windows XP: Click Start ➙...
  • Page 38 For additional information about this program, see the Help for the program. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 39: Fru Tests

    FRU tests The following table shows the test for each FRU. Table 1. FRU tests Applicable test 1. Diagnostics ➙ CPU/Coprocessor Systemboard 2. Diagnostics ➙ Systemboard 3. If the docking station or the port replicator is attached to the ThinkPad Notebook, detach it.

  • Page 40: Power System Checkout

    To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 41: Checking The Battery Pack

    Perform operational charging. If the battery status indicator or icon does not turn on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon still does not turn on, replace the battery pack. If the charge indicator still does not turn on, replace the system board.
  • Page 42 • 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. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 43: Chapter 4. Related Service Information

    Press and hold down the F1 key, and then turn on the computer. When the logo screen is displayed or if you hear repeating beeps, release the F1 key. The ThinkPad Setup program opens. b. Use the arrow keys to select Startup ➙ Boot. c. Select the CD/DVD drive as the 1st Boot Device. © Copyright Lenovo 2011...

  • Page 44: Passwords

    Note: There are two modes for the HDP: User only and Master + User. The Master + User mode requires two HDPs; the system administrator enters both in the same operation. The system administrator then provides the user HDP to the system user. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 45: Supervisor Password

    Attention: If the user HDP has been forgotten, check whether a master HDP has been set. If it has, it can be used for access to the hard disk drive. If no master HDP is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master HDP, or to recover data from the hard disk drive.
  • Page 46 7. Type the current master HDP in the Enter Current Password ield. then leave the Enter New Password ield blank, and press Enter twice. 8. Press F10. 9. Select Yes in the Setup Coniguration window. Both user HDP and master HDP will have been removed. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 47: Power Management

    Power management To reduce power consumption, the computer has three power management modes: screen blank, sleep (standby in Windows XP), and hibernation. Screen blank mode If the time set on the “Turn off monitor” timer in the operating system expires, the LCD backlight turns off. To put the computer into screen blank mode, do as follows: 1.
  • Page 48 When the power is turned on, the computer returns from hibernation mode and resumes operation. The hibernation ile in the boot record on the hard disk drive is read, and system status is restored from the hard disk drive. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 49: Symptom-To-Fru Index

    Symptom-to-FRU index This section contains following information: • “Numeric error codes” on page 43 • “Error messages” on page 45 • “Beep symptoms” on page 46 • “No-beep symptoms” on page 46 • “LCD-related symptoms” on page 46 • “Intermittent problems” on page 48 •...

  • Page 50: Numeric Error Codes

    1. Reseat the Mini SATA device. Read error on HDD2 (Mini SATA) 2. Mini SATA device. 3. System board. 2200 System board. Machine Type and Serial Number are invalid. 2201 System board. Machine UUID is invalid ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 51: Error Messages

    Thermal sensing error. System board. This system does not support batteries that are not Replace the battery. genuine Lenovo-made or authorized. This system will continue to boot, but may not charge unauthorized batteries. Attention: Lenovo has no responsibility for the...

  • Page 52: Beep Symptoms

    If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.
  • Page 53 • Lenovo will not provide replacement if the LCD is within speciication as we cannot guarantee that any replacement LCD will have zero pixel defects. • One pixel consists of R, G, B sub-pixels. Table 6. LCD-related symptoms Symptom or error...

  • Page 54: Intermittent Problems

    6. If the problem does not recur, reconnect the removed devices one at a time until you ind 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 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 55: Chapter 5. Status Indicators

    Chapter 5. Status indicators This chapter presents the system status indicators that show the status of the computer. © Copyright Lenovo 2011...
  • Page 56 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. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 57 Table 7. Status indicators (continued) Indicator Meaning Power on Green: The computer is on and ready to use. This indicator stays lit around the power-on button whenever the computer is on and is not in sleep (standby) mode. Note: This indicator blinks when the computer is in sleep mode. Numeric lock (On-screen By default, when the numeric lock is on, the numeric lock indicator is indicator)
  • Page 58 The battery pack of the computer is fully charged or detached. Sleep (standby for Windows Green: XP) status The computer is in sleep (standby) mode. Blinking green: The computer is entering sleep (standby) mode or hibernation mode, or is resuming normal operation. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 59: Chapter 6. Fn Key Combinations

    Switch between the computer display and an external monitor. Windows will show these display options: • Computer display only (LCD) • Computer display and external monitor (same image) • Computer display and external monitor (extended desktop function) • External monitor only © Copyright Lenovo 2011...
  • Page 60 To change the default brightness level, change the settings of the Power Option in the Control Panel or use the Power Manager. Fn+Spacebar Enable the Full Screen Magniier function. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 61 Table 8. Fn key combinations (continued) Key combination Description Fn+PrtSc Have the same function as the SysRq key. Fn+ScrLk Enable or disable the numeric keypad. The indicator of numeric lock will be displayed on the screen. Fn+Pause Have the same function as the Break key. Fn+cursor keys These key combinations work with Windows Media Player.
  • Page 62 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 63: Chapter 7. Fru Replacement Notices

    CRU; and (2) you may be charged for the replacement CRU if Lenovo does not receive the defective part within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full details.

  • Page 64: Retaining Serial Numbers

    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 LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart the computer.

  • Page 65: Retaining The Uuid

    When you replace the system board, you must set the UUID on the new system board as follows: 1. Install the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart the computer. 2. From the main menu, select 4. Assign UUID. A new UUID is created and written. If a valid UUID already exists, it is not overwritten.
  • Page 66 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 67: Chapter 8. Removing And Replacing A Fru

    CRU; and (2) you may be charged for the replacement CRU if Lenovo does not receive the defective part within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full details.

  • Page 68: Before Servicing Thinkpad T420 And T420I

    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.

  • Page 69: 1010 Battery Pack

    The only exception 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 the replacement of a physically damaged battery pack is not covered by the warranty.

  • Page 70: 1020 Expresscard Blank Bezel

    Removal steps of ExpressCard blank bezel When you press the ExpressCard blank bezel , it pops out When installing: Make sure that the bezel is correctly oriented as shown in the following igure. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 71: 1030 Serial Ultrabay Enhanced Device Or Travel Bezel

    1030 Serial Ultrabay Enhanced device or travel bezel For access, remove this FRU: • “1010 Battery pack” on page 63 Removal steps of Serial Ultrabay Enhanced device or travel bezel Holding the bay lock latch in the unlocked position , slide the bay eject latch in the direction shown by arrow , and then pull out the Serial Ultrabay Enhanced device or the travel bezel in the direction shown by arrow...

  • Page 72: 1040 Hard Disk Drive (Hdd) And Solid State Drive

    Removal steps of hard disk drive and solid state drive Note: Loosen the screw , but do not remove it. Step Screw (quantity) Color Torque Capture screw (1) Black 0.181 Nm (1.85 kgfcm) ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 73 For HDD and HDD rubber rails (9.5 mm): For HDD and HDD rubber rails (7.0mm) : For SSD and spacers: Chapter 8 Removing and replacing a FRU...
  • Page 74 When installing: Make sure that SSD spacers or HDD rubber rails are attached irmly. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 75: 1050 Dimm Slot Cover

    1050 DIMM slot cover For access, remove this FRU: • “1010 Battery pack” on page 63 Removal steps of DIMM slot cover Note: Loosen the screw , but do not remove it. Chapter 8 Removing and replacing a FRU...

  • Page 76: 1060 Dimm

    When installing: Insert the notched end of the DIMM into the socket. Press the DIMM irmly, and pivot it until it snaps into place. Make sure that it is irmly ixed in the slot and does not move easily. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 77: 1070 Pci Express Mini Card For Wireless Wan

    1070 PCI Express Mini Card for wireless WAN For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Removal steps of PCI Express Mini Card for wireless WAN In step , unplug the jacks by using the removal tool antenna RF connector (P/N: 08K7159), or pick the connectors with your ingers and gently unplug them in the direction of the arrow.
  • Page 78 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 igure. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 79: 1080 Keyboard

    1080 Keyboard For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Removal steps of keyboard Step Screw (quantity) Color Torque M2 × 10 mm, wafer-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgfcm)
  • Page 80 Lift the keyboard a little in the direction shown by arrow , and then detach the connector Installation steps of keyboard When installing the keyboard, do the following: 1. Attach the keyboard connector. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 81 2. Attach the keyboard so that the keyboard edges are under the frame. 3. To make sure that the front edge of the keyboard is housed irmly, gently press the keys with your palms and slightly slide the keyboard toward you until it snaps into position. Chapter 8 Removing and replacing a FRU...
  • Page 82 4. Make sure that the front edge of the keyboard is attached irmly. 5. Secure the keyboard by tightening the screws from the bottom side of the computer. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 83: 1090 Dimm (In The Slot Under The Keyboard)

    1090 DIMM (in the slot under the keyboard) For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Note: Your computer has two DIMM slots: one under the keyboard and another on the underside of the computer.
  • Page 84 When installing: Insert the notched end of the DIMM into the socket. Press the DIMM irmly, and pivot it until it snaps into place. Make sure that it is irmly ixed in the slot and does not move easily. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 85: 1100 Backup Battery

    1100 Backup battery For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Removal steps of backup battery DANGER Use only the battery speciied in the parts list for your computer. Any other battery could ignite or explode.
  • Page 86 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 87: 1110 Pci Express Mini Card For Wireless Lan

    1110 PCI Express Mini Card for wireless LAN For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Removal steps of PCI Express Mini Card for wireless LAN In step , unplug the jacks by using the removal tool antenna RF connector (P/N: 08K7159), or pick the connectors with your ingers and gently unplug them in the direction of the arrow.
  • Page 88 • In models with a wireless LAN card that has three antenna connectors, plug the gray cable (MAIN) into the jack marked TR1, the white cable (third) into the jack marked RO or TR3, and the black cable (AUX) into the jack marked TR2 on the card. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 89: 1120 Keyboard Bezel Assembly, Fpc Cable, And Bluethooth Daughter Card

    1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 •...
  • Page 90 Torque Step Screw (quantity) Color M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) Shoulder screw (2) Silver 0.181 Nm (1.85 kgfcm) ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 91 When installing: Make sure that the connector is attached irmly. Chapter 8 Removing and replacing a FRU...
  • Page 92 When installing: Make sure that the connectors are attached irmly. Step Screw (quantity) Color Torque M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 93 When installing: Make sure that the connector is attached irmly. Chapter 8 Removing and replacing a FRU...

  • Page 94: 1130 Smartcard

    • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 Removal steps of SmartCard Step Screw (quantity) Color Torque M2 × 3 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 95 When installing: Make sure that the connector is attached irmly. Removal steps of SmartCard dummy spacer Some models have a SmartCard dummy spacer as a miscellaneous part. For those models, remove the spacer as shown: Step Screw (quantity) Color Torque M2 ×...

  • Page 96: 1140 Modem Daughter Card (Mdc)

    Removal steps of modem daughter card (MDC) Torque Step Screw (quantity) Color M2 × 3 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) When installing: Make sure that the connector is attached irmly. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 97: 1150 Speaker Assembly

    1150 Speaker assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 Removal steps of speaker assembly Torque Step...
  • Page 98 When installing: Attach the speaker assembly and route the cable as shown in the following igure, and make sure that the speaker connector is attached irmly. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 99: 1160 Lcd Unit

    1160 LCD unit For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 •...
  • Page 100 Step Screw (quantity) Color Torque M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 101 Step Screw (quantity) Color Torque Black 0.392 Nm M2.5 × 6 mm, wafer-head, nylon-coated (2) (4.0 kgfcm) When installing: • Make sure that you attach the connectors irmly. • Make sure that you route the cables correctly and you tape up in the proper positions as shown in the above igure.
  • Page 102 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 103: 1170 Fan Assembly

    1170 Fan assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 •...
  • Page 104 Torque Step Screw (quantity) Color Capture shoulder screw (4) Silver 0.181 Nm (1.85 kgfcm) M2 × 3 mm, wafer-head, nylon-coated (1) black 0.181 Nm (1.85 kgfcm) For Discrete Graphics models: ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 105 For Integreted Graphics models: When installing: • Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on the parts marked as in the following igures. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component.
  • Page 106 • When attaching the fan assembly to the frame, take care not to damage the heat sink of the fan assembly. • Make sure that the fan connector is attached irmly. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 107: 1180 Cpu

    1180 CPU For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 •...

  • Page 108: Cable

    “1170 Fan assembly” on page 97 Removal steps of base cover assembly and DC-in connector cable Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 8 mm, wafer-head, nylon-coated (5) (1.85 kgfcm) ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 109 Torque Step Screw (quantity) Color M2 × 5 mm, wafer-head, nylon-coated (8) Black 0.181 Nm (1.85 kgfcm) When installing: Make sure that the connector is attached irmly. When installing: Make sure that the wireless switch is adjusted as shown in callout Chapter 8 Removing and replacing a FRU...
  • Page 110 Windows Certiicate of Authentication label (COA) Wireless LAN MAC address label Information label Ethernet MAC address label ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 111 Wireless WAN MAC address label China mobile IMEI label China telecom IMEI label SIRM labels (only for Malaysia) Wireless card label (only for Brazil) Anatel label (only for Brazil) Modem AMOM label (only for Brazil) Bluetooth label (only for Brazil) Israel label (50 mm x 19 mm) No MIC label (only for TAA module assembled in Mexico) Vodafone label...

  • Page 112: 1200 Magnesium Structure Frame

    • “1190 Base cover assembly and DC-in connector cable” on page 102 Removal steps of magnesium structure frame Torque Step Screw (quantity) Color M2 × 5 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 113 M2 × 8 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) Hex stud, nylon-coated (2) Silver 0.392 Nm (4.0 kgfcm) Chapter 8 Removing and replacing a FRU...

  • Page 114: 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. Accelerometer chip for the HDD Active Protection System ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 115 Platform Controller Hub (PCH) Graphic Processing Unit (GPU) (Discrete graphics chip) Note: The GPU is only for models with switchable graphics. Models with integrated graphics do not have a GPU on the system board. For Switchable Graphics models: For Integrated Graphics models: Chapter 8 Removing and replacing a FRU...

  • Page 116: 1220 Msata Solid State Drive

    • Before removing the drive, have the user make a backup copy of all the information on it if possible. • Never remove the drive while the system is operating or is in suspend mode. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 117 Removal steps of mSATA solid state drive Torque Step Screw (quantity) Color M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) Chapter 8 Removing and replacing a FRU...

  • Page 118: 2010 Lcd Bezel Assembly

    2010 LCD bezel assembly For access, remove the following FRU: • “1010 Battery pack” on page 63 Removal steps of LCD bezel assembly ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 119: 2020 Led Board

    2020 LED board For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “2010 LCD bezel assembly” on page 112 Removal steps of LED board Torque Step Screw (quantity) Color M2 × 3 mm, lat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm)
  • Page 120 When installing: Make sure that the connector is attached irmly. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 121: 2030 Integrated Camera

    2030 Integrated camera For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “2010 LCD bezel assembly” on page 112 Removal steps of integrated camera Step Screw (quantity) Color Torque M2 × 3 mm, lat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm)
  • Page 122 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 123: 2040 Lcd Panel And Lcd Cable

    2040 LCD panel and LCD cable For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 •...
  • Page 124 When installing: Make sure that the connector is attached irmly. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 125: 2050 Camera Cable

    2050 Camera cable For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 •...

  • Page 126: 2060 Wireless Lan Antenna Assembly Or Wireless Lan/Wan Antenna Assembly

    When installing: When you install the antenna kit, route the cables as shown in the igure above. As 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. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 127 Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 3 mm, lat-head, nylon-coated (2) (1.85 kgfcm) Chapter 8 Removing and replacing a FRU...

  • Page 128: 2070 Hinges And Lcd Rear Cover Assembly

    Removal steps of hinges and LCD rear cover assembly Torque Step Screw (quantity) Color M2.5 × 4 mm, wafer-head, nylon-coated (4) Black 0.392 Nm (4.0 kgfcm) When installing: Attach the hinges as shown in the following igure. ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 129 Chapter 8 Removing and replacing a FRU...
  • Page 130 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 131: Chapter 9. Locations

    Chapter 9. Locations This chapter presents the locations of ThinkPad T420 and T420i hardware components. Front view Integrated camera (for some models) ThinkLight Built-in microphone Built-in speakers Security keyhole Universal serial bus (USB)/eSATA combo connector USB connector Media Card Reader slot...
  • Page 132 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 133: Rear View

    Rear view Status indicators Note: For the description of each indicator, see Chapter 5 “Status indicators” on page 49. SmartCard slot DisplayPort connector USB connector RJ-45 (Ethernet) connector External monitor connector Power jack USB connector Modem connector or IEEE 1394 Chapter 9 Locations...

  • Page 134: Bottom View

    Bottom view Battery pack Battery pack latch DIMM slot Docking connector LCD cover latch Serial Ultrabay Enhanced lock latch Serial Ultrabay Enhanced eject latch ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 135: Chapter 10. Parts List

    CRU, Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You may ind a list of CRUs in the publications that ship with your product or at http://www.lenovo.com/CRUs. You may be required to return the defective part that is replaced by the CRU.

  • Page 136: Overall

    Overall ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 137 Table 9. Parts list—Overall FRU no. FRU (Overall) CRU ID a - c See “Miscellaneous parts” on page 156. LCD unit (see “LCD FRUs” on page 150.) ThinkPad b/g/n Wireless (1x1 BGN) 60Y3247 60Y3249 • 4177-CTO, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Kx, 2Lx, 2Mx, 2Xx, 2Yx, 36x, GFx, GKx, GLx, GMx, Q7x, QDx, QQx, QRx, QSx, R4x, RDx, RFx, RNx, RPx •...
  • Page 138 MYx, N3x, N6x, N7x, NAx, PDx, PHx, PJx, PKx, PLx, PPx, Q6x, Q7x, Q9x • 4236-CTO, 62x, 63x, 64x, 65x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NKx, NLx, NXx, P3x, P4x, P5x, P6x, P7x, PBx, PJx • 4237-CTO • 4238-CTO ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 139 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID 4-GB DDR3-1333 SDRAM SO-DIMM (PC3-10600) card 55Y3717 • 4177-CTO, 27x, 29x, 2Ax, 2Bx, 2Cx, 2Hx, 2Jx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, 2Sx, 2Tx, 2Ux, 2Vx, 2Wx, 2Yx, 32x, 33x, 34x, 35x, Q3x, Q5x, Q8x, QBx, QDx, QFx, QGx, QHx, QJx, QKx, QLx, QMx, QNx, QPx, QUx, QVx, QWx, QXx, QYx, QZx, R2x, R3x, R4x, R7x, R8x, RAx, RBx, RCx, RDx, RFx, RGx, RHx, RJx, RKx, RLx, RMx, RPx, RQx, RRx, RSx, RTx, RVx, RWx, RXx, RYx, RZx...
  • Page 140 NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, NWx, NXx, NYx, P2x, P3x, P4x, P5x, P6x, P8x, P9x, PBx, PCx, PDx, PEx, PHx, PJx • 4237-CTO • 4238-CTO Speaker assembly 04W1633 04W1634 Magnesium structure frame assembly 04W1629 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 141 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID DVD-RAM/RW drive 75Y5115 75Y5113 • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, 2Qx, 2Rx, 2Sx, 2Tx, 2Ux, 2Vx, 75Y5111 2Wx, 2Xx, 2Yx, 32x, 33x, 34x, 35x, 36x, GFx, GKx, GLx, GMx, Q2x, Q3x, Q4x, Q5x, Q8x, QAx, QBx, QCx, QEx, QGx, QHx, QJx, QKx, QLx, QMx, QNx, QPx,...
  • Page 142 NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, NWx, NXx, NYx, P2x, P3x, P4x, P5x, P6x, P8x, P9x, PAx, PBx, PCx, PDx, PEx, PFx, PGx, PHx, PJx, PLx, PPx, PQx • 4237-CTO • 4238-CTO ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 143 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID I/O sub card (1394 and USB) 04W1631 • 4177-CTO, 2Fx, 2Gx, 2Hx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, 2Qx, 2Rx, 2Sx, 2Tx, 2Ux, 2Vx, 2Wx, 2Yx, 35x, Q8x, QBx, QEx, QHx, QMx, QNx, R4x, R8x, RAx, RDx, RKx, RLx, RMx, RQx, RRx, RSx, RTx, RUx, RWx, RXx •...
  • Page 144 • 4177-CTO, QMx • 4178-CTO, 5Bx, 5Dx, 5Kx, 66x, 67x, 68x, 9Fx, 9Gx, BWx • 4179-CTO • 4180-CTO, 62x, 63x, MBx, MNx, PAx • 4236-CTO, 62x, 63x, MBx, NHx, NUx, PAx • 4237-CTO • 4238-CTO ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 145 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID Slice battery 42T4739 • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO DIMM slot door 04W1636 60Y3257 Integrated Mobile Broadband (Gobi 3000 3G with GPS) •...
  • Page 146 • 4236-CTO, N2x, N6x, NCx, NXx, NYx, PCx, PDx, PEx • 4237-CTO • 4238-CTO SATA hard disk drive, 500 GB, 5,400 rpm 45N7221 45N7309 • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 147 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID SATA hard disk drive, 160 GB, 7200 rpm 45N7251 45N7271 • 4177-CTO • 4178-CTO 45N7317 • 4179-CTO 45N7323 • 4180-CTO 42T1157 • 4236-CTO 42T1169 • 4237-CTO • 4238-CTO 42T1163 SATA hard disk drive, 250 GB, 7200 rpm •...
  • Page 148 P3x, P5x, P9x, PAx, PGx, PLx, PMx, PXx • 4237-CTO • 4238-CTO System board assembly, integrated graphics, AMT, non-TPM 04W2046 • 4177-CTO, 2Hx • 4178-CTO • 4179-CTO • 4180-CTO, MCx • 4236-CTO • 4237-CTO • 4238-CTO ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 149 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID System board assembly, integrated graphics, non-AMT, TPM 04W2047 • 4177-CTO, 25x, 26x, 27x, 28x, 29x, 2Dx, 2Ex, 2Qx, 2Rx, 2Sx, 35x, 36x, GKx, GMx, Q7x, QCx, QDx, QGx, QJx, QKx, QLx, QMx, QQx, QSx, QTx, QUx, QVx, R2x, R3x, R5x, R6x, R7x, R8x, R9x, RBx, RFx, RGx, RNx, RPx, RRx, RSx, RVx, RYx •...
  • Page 150 KNx, KTx, KUx, KVx, KWx, L5x, L9x, LAx, LBx, LCx, LDx, LJx, LKx, LLx, LMx, LZx, M4x, MBx, MKx, MQx, NDx, NEx • 4236-CTO, 63x, 65x, MBx, N2x, N5x, NAx, NBx, NHx, NSx, NTx, P5x, PCx, PDx • 4237-CTO • 4238-CTO ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 151 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID CPU assembly, i7-2620M (2.70 GHz) 04W0494 • 4177-CTO, 2Hx, 2Jx, Q7x, QAx, QBx, QFx • 4178-CTO, 5Xx, 5Yx, 67x, 6Ax, 6Gx, 6Wx, 99x, 9Mx, 9Sx, A4x, AEx, AFx, AWx, AXx, AYx •...
  • Page 152 • 4180-CTO, KEx, KFx, L9x, LAx, LBx, LPx, LQx, LVx, LXx, M8x, MCx, MDx, MEx, MRx, MSx, MZx, N2x, NDx, NEx, NFx, PBx, PCx, PUx, PVx, PWx, PXx, PYx, PZx, Q3x • 4236-CTO, N3x, NDx, NEx, PDx, PJx, PKx, PMx, PPx, PQx • 4237-CTO • 4238-CTO ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 153 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID Fan assembly, integrated 04W0407 • 4177-CTO, 25x, 26x, 27x, 28x, 29x, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Qx, 2Rx, 2Sx, 04W0409 35x, 36x, GKx, GMx, Q2x, Q5x, Q7x, Q8x, QAx, QCx, QDx, QGx, QJx, QKx, QLx, QMx, QNx, QQx, QSx, QTx, QUx, QVx, R2x, R3x, R5x, R6x, R7x, R8x, R9x, RBx, RFx, RGx, RMx, RNx, RPx, RRx, RSx, RVx, RYx •...
  • Page 154 MCx, MDx, MEx, MFx, MGx, MQx, MRx, MSx, MTx, MUx, MVx, MWx, MXx, MZx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NCx, NFx, PDx, PKx, PLx, PMx, PNx, PPx, PQx, PSx, PXx, Q3x, Q6x, Q7x, Q8x, Q9x ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 155 Table 9. Parts list—Overall (continued) FRU no. FRU (Overall) CRU ID • 4236-CTO, MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, NWx, NXx, NYx, P2x, P3x, P4x, P5x, P6x, P8x, P9x, PBx, PCx, PDx, PEx, PHx, PJx •...

  • Page 156: Lcd Frus

    LCD FRUs Table 10. Parts list—LCD FRUs No. FRU FRU no. See “Miscellaneous parts” on page 156. LCD bezel assembly 04W1609 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 157 Table 10. Parts list—LCD FRUs (continued) No. FRU FRU no. 60Y9994 Camera module • 4177-CTO, 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, 2Qx, 2Rx, 2Sx, 2Tx, 2Ux, 2Vx, 2Wx, 2Xx, 2Yx, 32x, 33x, 34x, 35x, 36x, GFx, GKx, GLx, GMx, Q2x, Q3x, Q4x, Q5x, Q8x, QAx, QBx, QDx, QEx, QGx, QHx, QJx, QKx, QLx, QMx, QNx, QPx, QQx, QRx, QSx, QUx, QVx, QWx, QXx, QYx, QZx, R2x, R3x, R4x, R7x, R8x, R9x, RAx, RBx, RCx, RDx, RFx, RGx, RHx,...
  • Page 158 NNx, NSx, NTx, NVx, P2x, PFx, PGx, PKx, PMx, PNx, PRx • 4237-CTO • 4238-CTO Hinges 04W1610 04W1612 04W1611 Wireless antenna set 04W1615 04W1616 LCD rear cover assembly 04W1608 LED cable with camera bracket 04W1619 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 159 Table 10. Parts list—LCD FRUs (continued) No. FRU FRU no. 04W1617 LCD cable (for 14.0-inch HD LCD module) • 4177-CTO, 25x, 26x, 27x, 28x, 2Dx, 2Jx, 2Mx, 2Rx, 2Sx, 2Tx, 2Ux, 2Vx, 2Wx, 32x, 33x, 34x, Q2x, Q5x, Q7x, QCx, QEx, QGx, QJx, QLx, QNx, QPx, QTx, QUx, QWx, QXx, QYx, QZx, R2x, R3x, R5x, R6x, R7x, R9x, RBx, RCx, RFx, RGx, RHx, RJx, RNx, RPx, RRx, RSx, RTx, RUx, RVx, RYx, RZx •...

  • Page 160: Keyboard

    Thai 45N2105 45N2175 45N2245 Traditional Chinese 45N2104 45N2174 45N2244 Turkish 45N2099 45N2169 45N2239 U.K. English 45N2100 45N2170 45N2240 U.S. English 45N2071 45N2141 45N2211 U.S. English (International, with a Euro symbol) 45N2101 45N2171 45N2241 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 161 Table 11. Parts list—Keyboard (continued) Language FRU no. Netherlands 45N2090 45N2160 45N2230 Turkish (F Type) 60Y9552 60Y9554 60Y9550 Chapter 10 Parts list...

  • Page 162: Miscellaneous Parts

    • Bracket - left speaker EMI spring • Bracket - FPR EMI • Speaker mesh • Face sheet - touchpad • ThinkPad logo • Bracket - touchpad button • Bracket - FPR • Insulation sheet - touchpad ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 163 • 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 •...

  • Page 164: Information About Ac Power Adapters

    3-pin (90 W, 20 V) adapter (models CTO, xxA, xxB, xxG, xxH, xxK, xxM, xxQ, xxT, xxV) 42T4433 3-pin (90 W, 20 V) adapter (models CTO, xxA, xxB, xxG, xxH, xxK, xxM, xxQ, xxT, xxV) 45N0068 ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 165: Power Cords

    Power cords A ThinkPad power cord for a speciic country or region is usually available only in that country or region: Table 15. Parts list—2-pin power cords Country or region FRU no. Argentina 42T5020 42T5105 • models -CTO, xxY Brazil 42T5180 42T5183 •...

  • Page 166: Recovery Discs

    • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO Table 18. Parts list—Windows Vista Business (32 bit) SP2 recovery DVDs Language English (for India) 04T1309 US English 04T1311 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 167 Windows Vista Home Basic (32 bit) SP2 DVDs Note: The Windows Vista recovery DVDs are available only for models with a valid Microsoft Windows Vista certiicate of authenticity (COA) afixed to the system. Due to a Microsoft licensing limitation, if a model came with Windows Vista Business or Windows Vista Ultimate preinstalled from the factory, but has a Windows 7 COA afixed to the system, that model is eligible only for recovery DVDs that match the operating system speciied on the COA.
  • Page 168 04T1330 Hebrew with English 04T1331 Hungarian with English 04T1333 Japanese 04T1334 Korea with English 04T1335 Polish 04T1336 Portuguese with English 04T1337 Romanian with English 04T1338 Russian 04T1339 Slovak with English 04T1340 04T1341 Spanish ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 169 Table 21. Parts list—Windows 7 Professional (64 bit) recovery DVDs (continued) Language 04T1342 Serbian-Latin with English Simpliied Chinese 04T1324 04T1332 Traditional Chinese with English (Hong Kong S.A.R.) Turkish with English 04T1343 Traditional Chinese with English 04T1325 04T1344 US English (Disabled) US English 04T1345 Windows 7 Home Basic (32 bit) DVDs...
  • Page 170 04T1378 Romanian with English 04T1379 Russian 04T1380 Slovak with English 04T1381 Simpliied Chinese 04T1366 Spanish 04T1382 Serbian-Latin with English 04T1383 Traditional Chinese with English 04T1367 04T1373 Traditional Chinese with English (Hong Kong S.A.R.) ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 171 Table 24. Parts list—Windows 7 Home Premium (64 bit) recovery DVDs (continued) Language Turkish with English 04T1384 US English (Disabled) 04T1385 US English 04T1386 Windows 7 Ultimate (32 bit) DVDs Windows 7 Ultimate (32 bit) is preinstalled as the operating system in the following models: •...

  • Page 172: Common Service Tools

    USB loppy diskette drive tool kit 27L3452 Test card for integrated Smart Card 42W7820 — LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later Note: Download the ile from the following Web site: http://www.lenovo.com/support ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 173: Appendix A. Notices

    Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead.

  • Page 174: Electronic Emissions Notices

    Electronic emissions notices For electronic emission information on Class B digital devices, refer to the corresponding information in the User Guide. ThinkPad T420 and T420i Hardware Maintenance Manual...

  • Page 175: Trademarks

    Trademarks The following terms are trademarks of Lenovo in the United States, other countries or both: Active Protection System Lenovo ThinkLight ThinkPad ThinkVantage TrackPoint Ultrabay The following terms are trademarks of Microsoft group of companies: Windows Microsoft The following terms are trademarks of Intel Corporation or its subsidiaries in the United States, other...
  • Page 176 ThinkPad T420 and T420i Hardware Maintenance Manual...
  • Page 178 Part Number: 0A60007_03 (1P) P/N: 0A60007_03 *0A60007_03*...

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