Lenovo ThinkPad T420s Hardware Maintenance Manual
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Lenovo ThinkPad T420s Hardware Maintenance Manual

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Hardware Maintenance Manual
ThinkPad T420s and T420si

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Summary of Contents for Lenovo ThinkPad T420s

  • Page 1 Hardware Maintenance Manual ThinkPad T420s and T420si...
  • Page 2 Appendix A “Notices” on page 141. Third Edition (August 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...

  • Page 3: Table Of Contents

    Diagnostics using PC-Doctor for DOS..Before servicing ThinkPad T420s and T420si Lenovo ThinkVantage Toolbox ..models....
  • Page 4 1150 System board, fan assembly, 34-mm Miscellaneous parts ... . ExpressCard reader, and base cover ..ac power adapter ... . . 1160 mSATA .

  • Page 5: About This Manual

    ® This manual contains service and reference information for the following ThinkPad products. ThinkPad T420s and T420si Machine types (MT) 4170, 4171, 4172, 4173, 4174, 4175, and 4176 Use this manual along with the advanced diagnostic tests to troubleshoot problems.
  • Page 6 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

    Electrical safety Observe the following rules when working on electrical equipment. Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents.Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges.

  • Page 9: Safety Inspection Guide

    – 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

    When handling ESD-sensitive parts: • Keep the parts in protective packages until they are inserted into the product. • Avoid contact with other people. • Wear a grounded wrist strap against your skin to eliminate static on your body. • Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when you are wearing a wrist strap.
  • Page 11 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 DANGER DANGER DANGER Hardware Maintenance Manual...
  • Page 13 Chapter 1 Safety information...
  • Page 14 Hardware Maintenance Manual...
  • Page 15 PERIGO PERIGO PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 16 PERIGO PERIGO PERIGO Hardware Maintenance Manual...
  • Page 17 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 18 DANGER DANGER DANGER Hardware Maintenance Manual...
  • Page 19 VORSICHT VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 20 VORSICHT VORSICHT VORSICHT Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
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  • Page 25 Chapter 1 Safety information...
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  • Page 27 Chapter 1 Safety information...
  • Page 28 Hardware Maintenance Manual...
  • Page 29 Chapter 1 Safety information...

  • Page 30: Laser Compliance Statement (Multilingual Translations)

    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 Hardware Maintenance Manual...
  • Page 31 Chapter 1 Safety information...
  • Page 32 Hardware Maintenance Manual...
  • Page 33 Chapter 1 Safety information...
  • Page 34 Hardware Maintenance Manual...
  • Page 35 Chapter 1 Safety information...
  • Page 36 Hardware Maintenance Manual...

  • Page 37: Chapter 2. Important Service Information

    – “FRU identification for CTO, CMV, and GAV products” on page 33 Important: Advise customers to contact the Lenovo Customer Support Center if they need any assistance in obtaining or installing any software fixes, drivers, and UEFI BIOS downloads. Telephone numbers for Lenovo Support are available at:http://www.lenovo.com/support/phone...

  • Page 38: Strategy For Replacing A Hard Disk Drive

    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. Important notice for replacing a system board Some components mounted on a system board are very sensitive.

  • Page 39: Fru Identification For Cto, Cmv, And Gav Products

    Custom Model Variant (CMV) This is a unique configuration that has been negotiated between IBM or Lenovo and the customer. A unique 4-digit MT and 3-digit model is provided to the customer to place orders (Example: 1829-W15). A CMV is a special bid offering. Therefore, it is NOT generally announced.
  • Page 40 select SERVICE PARTS. Under “Parts Information by Date” select SYSTEM SERVICE PARTS. The list of service parts by description, with applicable machine type model and FRU will be displayed. Using the HMM 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.

  • Page 41: Chapter 3. General Checkout

    “What to do first” on page 35 • “Checkout guide” on page 36 – “Diagnostics using PC-Doctor for DOS” on page 36 – “Lenovo ThinkVantage Toolbox” on page 39 – “FRU tests” on page 39 • “Power system checkout” on page 41 ®...

  • Page 42: Checkout Guide

    The ThinkPad Notebook has a test program called PC-Doctor for DOS (hereafter called PC-Doctor.) You can detect errors by running the diagnostics test included in PC-Doctor. Note: PC-Doctor for DOS is available at the following Web site: http://www.lenovo.com/supportTo create the PC-Doctor diagnostic CD, follow the instructions on the Web site.

  • Page 43: Testing The Computer

    Configuration utility for DOS. The utility is available on the following Web site: http://www.lenovo.com/support PC-Doctor cannot be used to test a device that is in the docking station, even if the computer supports the docking station.
  • Page 44 The options on the test menu are as follows: Diagnostics Interactive Tests • Run Normal Test • Keyboard • Run Quick Test • Video • CPU/Coprocessor • Internal Speaker • System Memory • Mouse • System board • Diskette • Video Adapter •...

  • Page 45: Lenovo Thinkvantage Toolbox

    You can also run this program as either of the following: • Click Start ➙ All Programs ➙ Lenovo ThinkVantage Tools ➙ System Health and Diagnostics. • Click Start ➙ Control Panel ➙ System and Security ➙ Lenovo's System Health and Diagnostics. Windows Vista and Windows XP: Click Start ➙...
  • Page 46 Table 1. FRU tests Applicable test System board 1. Diagnostics ➙ CPU/Coprocessor. 2. Diagnostics ➙ Systemboard. 3. If the docking station or the port replicator is attached to the ThinkPad Notebook, detach it. 4. Place the computer on a horizontal surface, and run Diagnostics ➙ ThinkPad Devices ➙...

  • Page 47: Power System Checkout

    Power system checkout To verify a symptom, do the following: 1. Turn off the computer. 2. Remove the battery pack. 3. Connect the ac power adapter. 4. Check that power is supplied when you turn on the computer. 5. Turn off the computer. 6.

  • Page 48: Checking Operational Charging

    Note: Noise from the ac power adapter does not always indicate a defect. Checking operational charging 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. Perform operational charging.
  • Page 49 3. Remove the battery pack (see “1010 Battery pack” on page 66). 4. Remove the backup battery (see “1090 Backup battery” on page 81). 5. Measure the voltage of the backup battery. See the following figure. Wire Voltage (V dc) +2.5 to +3.2 Black Ground...
  • Page 50 Hardware Maintenance Manual...

  • Page 51: Chapter 4. Related Service Information

    “Symptom-to-FRU index” on page 50 Service Web site: When the latest maintenance diskette and the system program service diskette become available, they will be posted on http://www.lenovo.com/spm Restoring the factory contents by using Product Recovery discs When the hard disk drive (HDD) or solid state drive (SSD) is replaced because of a failure, no Product Recovery program is on the new drive.
  • Page 52 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) This disc restores the Microsoft Windows operating system. Use this disc to start the recovery process. Applications and Drivers Recovery Disc (one or This disc restores the preinstalled applications and more discs)

  • Page 53: Passwords

    If it has, it can be used for access to the hard disk drive. If no master hard disk password is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master hard disk password, or to recover data from the hard disk drive. The hard disk drive can be replaced for a scheduled fee.

  • Page 54: How To Remove The Hard Disk Password

    Attention: If User only mode is selected and the user hard disk password has been forgotten and cannot be made available to the service technician, neither Lenovo nor Lenovo authorized service technicians provide any services to reset the user hard disk passwords or to recover data from the hard disk drive. The hard disk drive can be replaced for a scheduled fee.

  • Page 55: Sleep (Standby) Mode

    1. Press Fn+F3. A panel for selecting a power plan (in Windows XP, power scheme) appears. 2. Select Power off display (keep current power plan) (in Windows XP, keep current power scheme). You can also put the computer into screen blank mode, press ThinkVantage button and use the ThinkVantage Productivity Center.

  • Page 56: Symptom-To-Fru Index

    Note: If the computer enters the hibernation mode while it is docked to the docking station, do not undock it before resuming normal operation. If you do undock it and then try to resume normal operation, you will get an error message, and you will have to restart the system. To cause the computer to enter hibernation mode, do any of the following: •...

  • Page 57: Numeric Error Codes

    Numeric error codes Table 2. Numeric error codes Symptom or error FRU or action, in sequence 0177 System board. Bad SVP data, stop POST task—The checksum of the supervisor password in the EEPROM is not correct. 0182 1. Run ThinkPad Setup. Press F9, and Enter to load Bad CRC2.

  • Page 58: Error Messages

    System board. This system does not support batteries that are not Replace the battery. genuine Lenovo-made or authorized. The system will continue to boot, but may not charge unauthorized batteries. ATTENTION: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use.

  • Page 59: No-Beep Symptoms

    • This policy applies to all ThinkPad Notebooks purchased on 1 January, 2008 or later. • Lenovo will not provide replacement if the LCD is within specification as we cannot guarantee that any replacement LCD will have zero pixel defects.

  • Page 60: Intermittent Problems

    Table 6. LCD-related symptoms (continued) FRU or action, in sequence Symptom or error • LCD screen unreadable. 1. See important note for “LCD-related symptoms.” • Characters missing pixels. 2. Reseat all LCD connectors. • Screen abnormal. 3. LCD assembly. • Wrong color displayed. 4.

  • Page 61: Copyright Lenovo

    Chapter 5. Status indicators This chapter presents the system status indicators that show the status of the computer. © Copyright Lenovo 2011...
  • Page 62 Table 7. Status indicators Indicator Meaning Speaker mute The speaker is on mute. To set the speakers on mute or unmute, press Orange: the speaker mute button. Microphone mute Orange: The microphone is on mute. None of the recording devices is available while the microphone mute is on by default.
  • Page 63 Table 7. Status indicators (continued) Indicator Meaning Sleep (standby for Green: The computer is in sleep (standby) mode. Windows XP) status Blinking The computer is entering sleep (standby) mode or hibernation mode, green: or is resuming normal operation. Battery status Green: The battery charge level is 20% or higher.
  • Page 64 Hardware Maintenance Manual...

  • Page 65: Chapter 6. Fn Key Combinations

    Fn+F7 combination is available for switching a display output location. For Windows 7: Switch a display output location • Computer display only (LCD) • Computer display and external monitor (same image) • Computer display and external monitor (extended desktop) © Copyright Lenovo 2011...
  • Page 66 Table 8. Fn key combinations (continued) Key combination Description • External monitor only Note: To switch between the computer display and an external monitor, the Win+P key combination is also available. For Windows Vista and Windows XP: Switch a display output location •...

  • Page 67: Chapter 7. Fru Replacement Notices

    Never use a screw that you removed. Use a new one. Make sure that all of the screws are tightened firmly. • Ensure torque screw drivers are calibrated correctly following country specifications. © Copyright Lenovo 2011...

  • Page 68: 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 69: Reading Or Writing The Eca Information

    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 70 Hardware Maintenance Manual...

  • Page 71: Chapter 8. Removing And Replacing A Fru

    Before servicing ThinkPad T420s and T420si models Removing the SIM card: Some models of the ThinkPad T420s and T420si 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 72: 1010 Battery Pack

    Notice on disconnecting the cable from flip-lock ZIF connector: Some cables used in ThinkPad T420s and T420si models are connected to flip-lock ZIF connectors. When disconnecting a cable from the flip-lock ZIF connector, do as shown in this figure. 1010 Battery pack...

  • Page 73: 1020 Serial Ultrabay Slim Device Or Travel Bezel

    Table 9. Removal steps of battery pack DANGER Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode. Unlock the battery latch . Holding the battery latch in the unlocked position , remove the battery pack in the direction shown by arrows When installing:...

  • Page 74: 1030 Solid State Drive (Ssd) Or Hard Disk Drive (Hdd)

    Table 10. Removal steps of Serial Ultrabay Slim device or travel bezel (continued) 1030 Solid state drive (SSD) or hard disk drive (HDD) For access, remove the FRU: • “1010 Battery pack” on page 66 Attention: • Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper handling can cause damage and permanent loss of data.

  • Page 75: Ssd/Hdd

    Removal steps of SSD or HDD Torque Step Screw (quantity) Color M3 × 3 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) When installing: Make sure that the SSD or HDD is firmly attached. Chapter 8 Removing and replacing a FRU...

  • Page 76: 1040 Dimm

    For HDD and HDD rubber rails: For SSD and SSD spacers: 1040 DIMM For access, remove this FRU: • “1010 Battery pack” on page 66 Removal steps of DIMM Note: Remove the screws Hardware Maintenance Manual...
  • Page 77 Step Screw (quantity) Color Torque M2 × 5 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) Chapter 8 Removing and replacing a FRU...

  • Page 78: 1050 Pci Express Mini Card For Wireless Lan

    When installing: Insert the notched end of the DIMM into the socket. Press the DIMM in firmly, and pivot it until it snaps into place. Make sure that it is firmly attached in the slot and does not move easily. 1050 PCI Express Mini Card for wireless LAN For access, remove this FRU: •...

  • Page 79: Pci-E Mini Card For Wireless Lan

    Step Screw (quantity) Color Torque M2 × 5 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) Note: Some models might have only two antenna cables. Chapter 8 Removing and replacing a FRU...
  • Page 80 Step Screw (quantity) Color Torque M2 × 3 mm, small-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgfcm) Hardware Maintenance Manual...

  • Page 81: 1060 Pci Express Mini Card For Wireless Wan

    When installing: • In models with a wireless LAN card that has two antenna connectors, plug the gray cable into the jack labeled MAIN or M, and the black cable into the jack labeled AUX or A on the card. If the computer you are servicing has three cables, put the white cable in the cable protection tube.
  • Page 82 Step Screw (quantity) Color Torque M2 × 5 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) Hardware Maintenance Manual...

  • Page 83: 1070 4-In-1 Media Card Reader

    Torque Step Screw (quantity) Color M2 × 3 mm, small-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgfcm) When installing: Plug the orange cable into the jack labeled MAIN, and the blue cable into the jack labeled AUX on the card. 1070 4–in–1 media card reader For access, remove this FRU: •...

  • Page 84: 1080 Keyboard

    Removal steps of 4–in–1 media card reader 1080 Keyboard For access, remove this FRU: • “1010 Battery pack” on page 66 Removal steps of keyboard Note: Remove the screws Step Screw (quantity) Color Torque M2 × 5 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm)

  • Page 85: Color Torque

    Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 5 mm, flat-head, nylon-coated (2) (1.85 kgfcm) Slightly press the keyboard and slide it a little bit forward, in the direction shown by arrow , to detach the front edge of the keyboard from the frame. Then, lift up the keyboard in the direction shown by arrow Lift the keyboard a little in the direction shown by arrow , and then detach the connector Installation steps of keyboard...
  • Page 86 1. Attach the keyboard connector. 2. Attach the keyboard so that the keyboard edge is under the frame as shown in the following figure. Hardware Maintenance Manual...

  • Page 87: 1090 Backup Battery

    3. Gently press the keys with your palms and slightly slide the keyboard toward you until it snaps into position. 4. Secure the keyboard by tightening the screws from the bottom side of the computer. 1090 Backup battery For access, remove these FRUs in order: •...

  • Page 88: 1100 Palm Rest With Fingerprint Reader, Smart Card Reader, And Speaker

    Removal steps of backup battery When installing: Attach the backup battery in the insulation sheet as shown in the figure below and make sure that the battery connector is attached firmly. 1100 Palm rest with fingerprint reader, smart card reader, and speaker For access, remove these FRUs in order: •...

  • Page 89: Silver 0.181 Nm (1.85 Kgfcm)

    Removal steps of palm rest or palm rest with fingerprint reader Torque Step Screw (quantity) Color M2 × 5 mm, flat-head, nylon-coated (13) Black 0.181 Nm (1.85 kgfcm) M2.5 × 5 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) 0.181 Nm M2 ×...
  • Page 90 Hardware Maintenance Manual...
  • Page 91 Removal steps of smart card reader Torque Step Screw (quantity) Color M2 × 3 mm, flat-head, nylon-coated (5) Silver 0.181 Nm (1.85 kgfcm) Chapter 8 Removing and replacing a FRU...

  • Page 92: 1110 Lcd Unit

    Removal steps of speaker Torque Step Screw (quantity) Color M2 × 3 mm, flat-head, nylon-coated (4) Silver 0.181 Nm (1.85 kgfcm) 1110 LCD unit For access, remove these FRUs in order: • “1010 Battery pack” on page 66 • “1080 Keyboard” on page 78 •...

  • Page 93: Removing And Replacing A Fru

    Removal steps of LCD unit Step Screw Screw (quantity) Color Torque M2.5 × 5 mm, flat-head, nylon-coated (2) Black 0.392 Nm (4.0 kgfcm) Chapter 8 Removing and replacing a FRU...

  • Page 94: 1120 Dc-In Sub Card

    When installing • Make sure that you route the cables firmly and tape up in the proper positions as shown in the figure above. • When 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.

  • Page 95: 1130 Bluetooth Daughter Card (Bdc-3.0)

    Step Screw (quantity) Color Torque 0.181 Nm M2 × 3 mm, shoulder-socket head, nylon-coated (1) Silver (1.85 kgfcm) 1130 Bluetooth daughter card (BDC-3.0) • “1010 Battery pack” on page 66 • “1030 Solid state drive (SSD) or hard disk drive (HDD)” on page 68 •...
  • Page 96 • “1060 PCI Express Mini Card for wireless WAN” on page 75 • “1070 4–in–1 media card reader” on page 77 • “1080 Keyboard” on page 78 • “1100 Palm rest with fingerprint reader, smart card reader, and speaker” on page 82 •...

  • Page 97: 1150 System Board, Fan Assembly, 34-Mm Expresscard Reader, And Base Cover

    1150 System board, fan assembly, 34-mm ExpressCard reader, and base cover Important notices for handling the system board: When handling the system board, read the following: • The system board has an accelerometer, which can be broken when several thousands of G-forces are applied.
  • Page 98 • “1070 4–in–1 media card reader” on page 77 • “1080 Keyboard” on page 78 • “1100 Palm rest with fingerprint reader, smart card reader, and speaker” on page 82 • “1110 LCD unit” on page 86 • “1120 DC-in sub card” on page 88 •...
  • Page 99 Step Screw (quantity) Color Torque Black 0.181 Nm M 2 × 9 mm, flat head, nylon-coated (1) (1.85 kgfcm) M2 × 3 mm, flat head, nylon-coated (1) Silver 0.181 Nm (1.85 kgfcm) Torque Step Screw (quantity) Color M2 × 5 mm, big-head, nylon-coated (4) Black 0.181 Nm (1.85 kgfcm)
  • Page 100 In step , remove the system board with fan assembly together from the base cover assembly. Turn the system board over, and then disconnect the fan assembly from the system board. Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 5 mm, big-head, nylon-coated (4) (1.85 kgfcm) When installing: •...
  • Page 101 • Make sure that the fan connector is attached firmly. Remove the three screws and then remove the 34-mm ExpressCard reader from the system board. Torque Step Screw (quantity) Color M2 × 3 mm, flat-head, nylon-coated (3) Silver 0.181 Nm (1.85 kgfcm) Chapter 8 Removing and replacing a FRU...
  • Page 102 Applying labels to the base cover: The new base cover FRU is shipped with a kit containing labels of several kinds. The following illustration shows the location of each label. Note: If the Windows Certificate of Authentication label (COA) is attached to a part that is replaced, return the old part with the label attached to the customer, or provide a letter to the customer stating what the label was originally on the system and what the label part number, serial number, and product key were.

  • Page 103: 1160 Msata

    IMEI/ESN label Onboard LAN MAC address label China Telecom label China 3G WWAN label Taiwan WWAN label Product label For some models, you may need to apply two FCC labels. Check the old base cover; if it has two FCC labels, apply both to the new base cover.
  • Page 104 Step Screw (quantity) Color Torque M2 × 3 mm, small-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgfcm) Hardware Maintenance Manual...

  • Page 105: 2010 Lcd Bezel Assembly

    2010 LCD bezel assembly For access, remove this FRU: • “1010 Battery pack” on page 66 Removal steps of LCD bezel assembly Step Screw Screw (quantity) Color Torque M2 × 5 mm, shoulder-socket head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) Chapter 8 Removing and replacing a FRU...

  • Page 106: 2020 Lcd Panel

    2020 LCD panel For access, remove these FRUs, in order: • “1010 Battery pack” on page 66 • “2010 LCD bezel assembly” on page 99 The LCD panel and the peripheral parts used in this product are very sensitive. Improper handling of the LCD panel can cause damage to the parts, and may cause a system malfunction such as a missing dot, missing line, or pixel problems.

  • Page 107: Lcd Panel

    Removal steps of LCD panel Attention: Unplug the LCD cable by holding the left and right edges of the connector with your fingers, and gently pull the connector toward you. Do not unplug the cable by pulling it. Applying tension to the cable could cause the cable to be damaged or a wire to be broken.

  • Page 108: 2030 Integrated Camera, Microphone, Or Hall Sensor Card

    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. 2030 Integrated camera, microphone, or hall sensor card For access, remove these FRUs, in order: •...
  • Page 109 Removal steps of integrated camera, microphone, or hall sensor card Torque Step Screw (quantity) Color M2 × 3 mm, small-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgfcm) When installing: Make sure that the connector of the integrated camera, microphone, or the hall sensor card is attached firmly. Chapter 8 Removing and replacing a FRU...

  • Page 110: 2040 Led Sub Card

    2040 LED sub card For access, remove these FRUs in order: • “1010 Battery pack” on page 66 • “2010 LCD bezel assembly” on page 99 • “2020 LCD panel” on page 100 Hardware Maintenance Manual...

  • Page 111: 2050 Lcd Cable

    Removal steps of LED sub card Step Screw (quantity) Color Torque M2 × 3 mm, small-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgfcm) When installing: Make sure that the connector is attached firmly. 2050 LCD cable For access, remove these FRUs in order: •...

  • Page 112: 2060 Hinge Kit

    • “2010 LCD bezel assembly” on page 99 • “2020 LCD panel” on page 100 • “2030 Integrated camera, microphone, or hall sensor card” on page 102 • “2040 LED sub card” on page 104 Removal steps of LCD cable Cable routing: When you install the LCD cable, route the cable as shown in the figure above.
  • Page 113 • “2020 LCD panel” on page 100 • “2030 Integrated camera, microphone, or hall sensor card” on page 102 • “2040 LED sub card” on page 104 • “2050 LCD cable” on page 105 Removal steps of hinge kit Step Screw (quantity) Color Torque...

  • Page 114: 2070 Led Cable

    2070 LED cable For access, remove these FRUs in order: • “1010 Battery pack” on page 66 • “1020 Serial Ultrabay Slim device or travel bezel” on page 67 • “1030 Solid state drive (SSD) or hard disk drive (HDD)” on page 68 •...

  • Page 115: 2080 Antenna Kit And Lcd Rear Cover Assembly

    Removal steps of LED cable Cable routing: When you install the LED cable, route the cable as shown in the figure below. 2080 Antenna kit and LCD rear cover assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 66 •...
  • Page 116 • “1110 LCD unit” on page 86 • “1120 DC-in sub card” on page 88 • “1140 Bluetooth-wireless radio switch FPC” on page 89 • “1150 System board, fan assembly, 34-mm ExpressCard reader, and base cover” on page 91 • “2010 LCD bezel assembly”...
  • Page 117 When you install the antenna kit, route the cables as shown in the figures below. 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.
  • Page 118 Hardware Maintenance Manual...

  • Page 119: Chapter 9. Locations

    Chapter 9. Locations This chapter presents the locations of the ThinkPad T420s and T420si hardware components. Front view Wireless radio switch Integrated camera (for some models) ThinkLight light Fingerprint reader (for some models) Built-in microphone TrackPoint pointing stick ThinkVantage button...

  • Page 120: Rear View

    Rear view Status indicators DisplayPort connector 34-mm ExpressCard slot or 4-in-1 media card reader Always On USB connector slot Combo audio jack USB connector USB connector Ethernet connector Monitor connector ac power connector : For the description of each indicator, see Chapter 5 “Status indicators” on page 55. Bottom view Expansion slot (DIMM, PCI Express Mini Card for Battery pack latch...

  • Page 121: 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 find 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 122: Overall

    Overall Hardware Maintenance Manual...
  • Page 123 Table 11. Parts list—Overall No. FRU (Overall) FRU no. See “Miscellaneous parts” on page 132. LCD unit (see “LCD FRUs” on page 127.) Keyboard bezel assembly 04W1451 N • 4170–CTO, 39x, 38x, 3Ax, 35x, 34x, 22x, 23x, 24x, 25x, 26x, 37x, 36x •...
  • Page 124 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. 60Y3233 Intel Centrino Ultimate-N 6300 • 4170–CTO • 4171–CTO, 5Mx • 4172–CTO • 4173–CTO, KYx, KXx, KNx, JKx, JJx, JHx, JGx, JFx, JCx, JBx, J4x • 4174–CTO, P4x, NTx, NSx, NNx, NEx, NDx Intel Centrino Advanced-N + WiMAX 6250 60Y3195 •...
  • Page 125 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. 60Y3283 Integrated Mobile Broadband (Gobi 3000) • 4170–CTO, 39x, 38x, 3Ax, 35x, 34x, 22x, 23x, 25x, 26x, 27x, 33x, 32x, 37x, 36x • 4171–CTO, 6Tx, 6Sx, 6Px, 6Nx, 6Mx, 6Jx, 6Hx, 6Gx, 6Fx, 5Vx, 5Ux, 5Tx, 5Rx, 5Px, 5Nx, 5Fx, 5Dx, 55x, 54x, 53x, 52x, 6Rx, 6Qx, 6Ex, 65x, 64x, 63x, 62x •...
  • Page 126 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. 45N7485 * DVD-ROM drive • 4170–CTO, 39x, 38x, 3Ax, 35x, 34x, 22x, 23x, 24x, 25x, 26x, 27x, 33x, 32x, 37x, 36x • 4171–CTO, 6Tx, 6Sx, 6Px, 6Nx, 6Mx, 6Jx, 6Hx, 6Gx, 6Fx, 5Zx, 5Yx, 5Xx, 5Vx, 5Ux, 5Tx, 5Rx, 5Px, 5Nx, 5Mx, 5Jx, 5Hx, 5Fx, 5Ex, 5Dx, 5Bx, 5Ax, 55x, 54x, 53x, 52x, 6Rx, 6Qx, 6Ex, 68x, 66x, 65x, 64x, 63x, 62x •...
  • Page 127 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. DVD rambo drive 45N7453 * • 4170–CTO, 39x, 38x, 3Ax, 35x, 34x, 22x, 23x, 24x, 25x, 26x, 27x, 33x, 32x, 37x, 36x • 4171–CTO, 6Tx, 6Sx, 6Px, 6Nx, 6Mx, 6Jx, 6Hx, 6Gx, 6Fx, 5Zx, 5Yx, 5Xx, 5Vx, 5Ux, 5Tx, 5Rx, 5Px, 5Nx, 5Mx, 5Jx, 5Hx, 5Fx, 5Ex, 5Dx, 5Bx, 5Ax, 55x, 54x, 53x, 52x, 6Rx, 6Qx, 6Ex, 68x, 66x, 65x, 64x, 63x, 62x •...
  • Page 128 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. HDD rubber 04W1716 ** • 4170–CTO, 39x, 38x, 3Ax, 22x, 23x, 24x, 26x, 27x, 32x, 37x, 36x • 4171–CTO, 6Sx, 6Px, 6Nx, 6Hx, 6Gx, 6Fx, 5Zx, 5Yx, 5Xx, 5Vx, 5Ux, 5Tx, 5Rx, 5Px, 5Nx, 5Mx, 5Fx, 5Ex, 5Dx, 5Bx, 5Ax, 52x, 6Rx, 6Qx, 6Ex, 68x, 66x, 65x, 64x, 63x, 62x •...
  • Page 129 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. 45N7995 ** Solid state drive, 128 GB • 4170–CTO, 35x, 34x, 33x • 4171–CTO, 53x • 4172–CTO • 4173–CTO, KSx, KKx, KJx, KFx, K6x, K2x, JVx, JSx, JPx, JJx, JAx, 2Ax •...
  • Page 130 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. 04W2002 N System board assembly, with Intel Core i5-2520M processor, integrated, AMT, TPM, AES • 4170–CTO, 3Ax, 34x, 27x • 4171–CTO, 6Tx, 6Sx, 6Gx, 6Fx, 5Zx, 5Xx, 5Rx, 5Nx, 5Jx, 5Hx, 5Fx, 5Bx, 5Ax, 55x, 54x, 52x •...
  • Page 131 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. 04W2008 N System board assembly, with Intel Core i5-2520M processor, integrated, AMT, non-TPM, non-AES • 4170–CTO, 39x, 38x • 4171–CTO, 6Px, 6Nx, 5Vx, 5Tx • 4172–CTO • 4173–CTO • 4174–CTO, N7x, N6x 04W2009 N System board assembly, with Intel Core i7-2620M processor, integrated, AMT, non-TPM, non-AES...
  • Page 132 Table 11. Parts list—Overall (continued) No. FRU (Overall) FRU no. 04W2016 N System board assembly, with Intel Core i5-2540M processor, integrated, non-AMT, non-TPM, non-AES • 4170–CTO • 4171–CTO • 4172–CTO • 4173–CTO • 4174–CTO 04W2017 N System board assembly, with Intel Core i5-2520M integrated, none-AMT, none-TPM, none-AES •...

  • Page 133: Lcd Frus

    LCD FRUs In ThinkPad T420s and T420si models, there are following types of LCDs. • 14.1-inch WXGA+ TFT LED-backlight LCD (Table 12 “Parts list—14.1-inch WXGA+ LED-backlight LCD” on page 128) Chapter 10 Parts list...
  • Page 134 Table 12. Parts list—14.1-inch WXGA+ LED-backlight LCD No. FRU (14.1-inch WXGA+ LED-backlight LCD) FRU no. 04W1675 N LCD bezel assembly • 4170–CTO, 39x, 38x, 3Ax, 35x, 34x, 22x, 23x, 24x, 25x, 26x, 27x, 33x, 32x, 37x, 36x • 4171–CTO, 6Tx, 6Sx, 6Px, 6Nx, 6Mx, 6Jx, 6Hx, 6Gx, 6Fx, 5Zx, 5Yx, 5Xx, 5Vx, 5Ux, 5Tx, 5Rx, 5Px, 5Nx, 5Mx, 5Jx, 5Hx, 5Fx, 5Ex, 5Dx, 5Bx, 5Ax, 55x, 54x, 53x, 52x, 6Rx, 6Qx, 6Ex, 68x, 66x, 65x, 64x, 63x, 62x •...
  • Page 135 Table 12. Parts list—14.1-inch WXGA+ LED-backlight LCD (continued) No. FRU (14.1-inch WXGA+ LED-backlight LCD) FRU no. Antenna kit 04W1683 N • 4170–CTO, 39x, 38x, 3Ax, 35x, 34x, 22x, 23x, 24x, 25x, 26x, 27x, 33x, 32x, 37x, 36x • 4171–CTO, 6Tx, 6Sx, 6Px, 6Nx, 6Mx, 6Jx, 6Hx, 6Gx, 6Fx, 5Zx, 5Yx, 5Xx, 5Vx, 5Ux, 5Tx, 5Rx, 5Px, 5Nx, 5Mx, 5Jx, 5Hx, 5Fx, 5Ex, 5Dx, 5Bx, 5Ax, 55x, 54x, 53x, 52x, 6Rx, 6Qx, 6Ex, 68x, 66x, 65x, 64x, 63x, 62x •...
  • Page 136 Table 12. Parts list—14.1-inch WXGA+ LED-backlight LCD (continued) No. FRU (14.1-inch WXGA+ LED-backlight LCD) FRU no. LED cable assembly 04W1685 N • 4170–CTO, 39x, 38x, 3Ax, 35x, 34x, 22x, 23x, 24x, 25x, 26x, 27x, 33x, 32x, 37x, 36x • 4171–CTO, 6Tx, 6Sx, 6Px, 6Nx, 6Mx, 6Jx, 6Hx, 6Gx, 6Fx, 5Zx, 5Yx, 5Xx, 5Vx, 5Ux, 5Tx, 5Rx, 5Px, 5Nx, 5Mx, 5Jx, 5Hx, 5Fx, 5Ex, 5Dx, 5Bx, 5Ax, 55x, 54x, 53x, 52x, 6Rx, 6Qx, 6Ex, 68x, 66x, 65x, 64x, 63x, 62x •...

  • Page 137: Keyboard

    Table 12. Parts list—14.1-inch WXGA+ LED-backlight LCD (continued) No. FRU (14.1-inch WXGA+ LED-backlight LCD) FRU no. Hinge kit 04W1677 N • 4170–CTO, 39x, 38x, 3Ax, 35x, 34x, 22x, 23x, 24x, 25x, 26x, 27x, 33x, 32x, 37x, 36x • 4171–CTO, 6Tx, 6Sx, 6Px, 6Nx, 6Mx, 6Jx, 6Hx, 6Gx, 6Fx, 5Zx, 5Yx, 5Xx, 5Vx, 5Ux, 5Tx, 5Rx, 5Px, 5Nx, 5Mx, 5Jx, 5Hx, 5Fx, 5Ex, 5Dx, 5Bx, 5Ax, 55x, 54x, 53x, 52x, 6Rx, 6Qx, 6Ex, 68x, 66x, 65x, 64x, 63x, 62x •...

  • Page 138: Miscellaneous Parts

    Table 13. Parts list—Keyboard (continued) Language FRU no. Icelandic 45N2087 45N2157 45N2227 Italian 45N2088 45N2158 45N2228 Japanese 45N2102 45N2172 45N2242 Kazakhstan 45N2089 45N2159 45N2229 Korean 45N2103 45N2173 45N2243 45N2074 45N2144 45N2214 Latin American Spanish Norwegian 45N2091 45N2161 45N2231 Polish 45N2092 45N2162 45N2232 Portuguese...

  • Page 139: Ac Power Adapter

    ac power adapter Table 15. Parts list—2-pin ac power adapters FRU no. 2-pin (65 W, 20 V) adapter (models CTO, xxE, xxF, xxJ, xxL, xxP, xxS, xxU, xxY) 42T5282 2-pin (65 W, 20 V) adapter (models CTO, xxE, xxF, xxJ, xxL, xxP, xxS, xxU, xxY) 92P1214 92P1159 2-pin (65 W, 20 V) adapter (models CTO, xxE, xxF, xxJ, xxL, xxP, xxS, xxU, xxY)

  • Page 140: Recovery Discs

    Table 18. Parts list—2-pin power cords (continued) FRU no. Country or region 42T5008 42T5093 Canada, U.S. • models -CTO, xxF, xxL, xxS, xxU Japan 42T5014 42T5099 • models -CTO, xxE, xxJ Table 19. Parts list—3-pin power cords Country or region FRU no.

  • Page 141: Windows Xp Professional Generic (32 Bit) Dvds

    • 4174-CTO Table 20. Parts list—Windows XP Professional (32 bit) recovery DVDs Language English 03W8319 Japanese 03W8392 Windows XP Professional Generic (32 bit) DVDs Windows XP Professional generic is preinstalled as the operating system in the following models: • 4170-CTO •...

  • Page 142: Windows Vista Home Basic (32 Bit) Dvds

    Windows Vista Home Basic (32 bit) DVDs Windows Vista Home Basic (32 bit) is preinstalled as the operating system in the following models: • 4170-CTO • 4171-CTO • 4172-CTO • 4173-CTO • 4174-CTO Table 22. Parts list—Windows Vista Home Basic (32 bit) recovery DVDs Language English 03W8309...

  • Page 143: Windows 7 Home Basic (32 Bit) Dvds

    • 4170-CTO • 4171-CTO • 4172-CTO • 4173-CTO • 4174-CTO Table 25. Parts list—Windows 7 Ultimate (64 bit) recovery DVDs Language English 03W8351 Windows 7 Home Basic (32 bit) DVDs Windows 7 Home Basic (32 bit) is preinstalled as the operating system in the following models: •...

  • Page 144: Windows 7 Home Premium (64 Bit) Dvds

    Table 27. Parts list—Windows 7 Home Premium (32 bit) recovery DVDs Language 03W8363 Simplified Chinese Indian English 03W8364 English 03W8365 Windows 7 Home Premium (64 bit) DVDs Windows 7 Home Premium (64 bit) is preinstalled as the operating system in the following models: •...

  • Page 145: Windows 7 Professional (32 Bit) Dvds

    Table 28. Parts list—Windows 7 Home Premium (64 bit) recovery DVDs (continued) Language 03W8389 EMEA (NL/FR/GR/IT/EN) Croatian (EN/SL/CR) 03W8390 Windows 7 Professional (32 bit) DVDs Windows 7 Professional (32 bit) is preinstalled as the operating system in the following models: •...

  • Page 146: Common Service Tools

    USB floppy diskette drive for maintenance diskette 05K9283 27L3452 USB floppy diskette drive tool kit 42W7820 Test card for integrated Smart Card — LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later Note: Download the file from the following Web site: http://www.lenovo.com/support Hardware Maintenance Manual...

  • Page 147: 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 148: Electronic Emissions Notices

    For electronic emission information on Class B digital devices, refer to the corresponding information in the User Guide. Trademarks The following terms are trademarks of Lenovo in the United States, other countries or both: Active Protection System Lenovo Rescue and Recovery...
  • Page 150 Part Number: 0A60241_02 Printed in China (1P) P/N: 0A60241_02 *0A60241_02*...

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