Lenovo T420- User Manual

Lenovo T420

Lenovo T420– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 2 – under Appendix A “Notices” on page 167.
  • Page 3 – Contents; iii
  • Page 4 – ii
  • Page 5 – About this manual
  • Page 6 – iv
  • Page 7 – Chapter 1. Safety information; General safety; you think is too heavy for you.
  • Page 8 – Electrical safety; exposed
  • Page 10 – Grounding requirements
  • Page 11 – Safety notices (multilingual translations); DANGER
  • Page 13 – PERIGO
  • Page 23 – Laser compliance statement (multilingual translations)
  • Page 29 – Chapter 2. Important service information; Strategy for replacing FRUs; Before replacing parts:; Strategy for replacing a hard disk drive
  • Page 30 – Important notice for replacing a system board; When handling a system board:; How to use error message
  • Page 31 – custom models and are not found in the HMM.; FRU identification for CTO, CMV, and GAV products; Using PEW; • PEW can be accessed at the following Web site:; Using eSupport
  • Page 33 – Chapter 3. General checkout; Only certified trained personnel should service the computer.; Replace a FRU only with another FRU of the correct model.; Be careful not to replace a nondefective FRU.
  • Page 34 – What to do first; The following are not covered under warranty:; or the insertion of a diskette with multiple labels
  • Page 35 – Checkout guide; Identify the failing symptoms in as much detail as possible.; Diagnostics using PC-Doctor for DOS; To enter the ThinkPad Setup program, do as follows:; Testing the computer
  • Page 36 – Press cursor keys to select; ATAPI CDx; Follow the instructions on the screen.; Diagnostics; Instead of pressing Enter, click the left button.
  • Page 37 – Detecting system information with PC-Doctor; PC-Doctor can detect the following system information:; Hardware Info; Lenovo ThinkVantage Toolbox; Lenovo ThinkVantage; Download Lenovo ThinkVantage; • Click
  • Page 39 – FRU tests; The following table shows the test for each FRU.
  • Page 40 – Pin; Checking operational charging
  • Page 41 – Checking the battery pack; To check the battery pack, do the following:; Terminal; Checking the backup battery; Power off the computer, and unplug the ac power adapter from it.
  • Page 42 – Wire; • If the voltage is correct, replace the system board.
  • Page 43 – Chapter 4. Related service information; Restoring the factory contents by using Recovery Disc Set; Operating System Recovery Disc; Startup
  • Page 44 – Passwords
  • Page 45 – (B) If an SVP has been set and is known by the service technician:; How to remove the hard-disk password
  • Page 47 – Power off display (keep current power plan); Hibernation mode
  • Page 49 – Numeric error codes; Symptom or error; Charge the battery pack.
  • Page 51 – Error messages; System board; Replace the battery
  • Page 52 – Beep symptoms
  • Page 54 – Intermittent problems; When analyzing an intermittent problem, do the following:; at least 10 times; Undetermined problems; Verify that all attached devices are supported by the computer.
  • Page 55 – Chapter 5. Status indicators
  • Page 56 – Indicator
  • Page 58 – The battery status indicator is off:
  • Page 59 – Chapter 6. Fn key combinations; Key combination
  • Page 63 – Chapter 7. FRU replacement notices; External CRU statement to customers; Installation of Self-service CRUs is your responsibility you may; Screw notices; Plastic to plastic
  • Page 64 – Retaining serial numbers; Set System Identification
  • Page 65 – Product ID on rear label:; Retaining the UUID; Set ECA Information
  • Page 67 – Chapter 8. Removing and replacing a FRU
  • Page 69 – Unlock the battery latch
  • Page 70 – 020 ExpressCard blank bezel; Removal steps of ExpressCard blank bezel; When you press the ExpressCard blank bezel
  • Page 71 – 030 Serial Ultrabay Enhanced device or travel bezel; Removal steps of Serial Ultrabay Enhanced device or travel bezel; Holding the bay lock latch in the unlocked position
  • Page 72 – handling can cause damage and permanent loss of data.; Removal steps of hard disk drive and solid state drive; Loosen the screw; Step
  • Page 74 – Make sure that SSD spacers or HDD rubber rails are attached firmly.
  • Page 75 – Removal steps of DIMM slot cover
  • Page 76 – 060 DIMM (in the slot on the underside of the computer); Removal steps of DIMM (in the slot on the underside of the computer)
  • Page 77 – 070 PCI Express Mini Card for wireless WAN; Removal steps of PCI Express Mini Card for wireless WAN; In step
  • Page 78 – Plug the yellow cable into the jack labeled; MAIN; , and the blue cable into the jack labeled; AUX
  • Page 79 – Removal steps of keyboard; Push down the keyboard a little and slide it toward the arrow
  • Page 80 – Installation steps of keyboard; When installing the keyboard, do the following:
  • Page 81 – Attach the keyboard so that the keyboard edges
  • Page 82 – Make sure that the front edge of the keyboard
  • Page 83 – 090 DIMM (in the slot under the keyboard); Removal steps of DIMM (in the slot under the keyboard)
  • Page 85 – sure that the battery connector is attached firmly.
  • Page 87 – 110 PCI Express Mini Card for wireless LAN; Removal steps of PCI Express Mini Card for wireless LAN
  • Page 89 – “1020 ExpressCard blank bezel” on page 64
  • Page 91 – Make sure that the connector is attached firmly.
  • Page 92 – Make sure that the connectors are attached firmly.
  • Page 94 – Removal steps of SmartCard
  • Page 95 – Removal steps of SmartCard dummy spacer
  • Page 96 – Removal steps of modem daughter card (MDC)
  • Page 97 – Removal steps of speaker assembly
  • Page 98 – make sure that the speaker connector is attached firmly.
  • Page 99 – Removal steps of LCD unit
  • Page 101 – • Make sure that you attach the connectors firmly.
  • Page 103 – Removal steps of fan assembly
  • Page 104 – For Discrete Graphics models
  • Page 105 – For Integreted Graphics models; the parts marked; For Discrete Graphics models:
  • Page 107 – Removal steps of CPU
  • Page 108 – 190 Base cover assembly and DC-in connector cable; Removal steps of base cover assembly and DC-in connector cable
  • Page 110 – Note: Applying labels to the base cover
  • Page 112 – 200 Magnesium structure frame; Removal steps of magnesium structure frame
  • Page 114 – 210 System board and ExpressCard slot assembly; Important notices for handling the system board:; Removal steps of system board and ExpressCard slot assembly
  • Page 115 – For Switchable Graphics models:
  • Page 116 – 220 mSATA solid state drive
  • Page 117 – Removal steps of mSATA solid state drive
  • Page 118 – Removal steps of LCD bezel assembly
  • Page 119 – Removal steps of LED board
  • Page 121 – Removal steps of integrated camera
  • Page 123 – 040 LCD panel and LCD cable; Removal steps of LCD panel and LCD cable
  • Page 125 – Removal steps of camera cable
  • Page 128 – 070 Hinges and LCD rear cover assembly; Removal steps of hinges and LCD rear cover assembly
  • Page 131 – Front view
  • Page 133 – Rear view
  • Page 134 – Bottom view
  • Page 135 – Chapter 10. Parts list; Optional-service CRUs
  • Page 136 – Overall
  • Page 137 – CRU ID
  • Page 156 – LCD FRUs
  • Page 160 – Keyboard; Language
  • Page 162 – Miscellaneous parts; FRU
  • Page 164 – Information about ac power adapters
  • Page 165 – Power cords; Country or region
  • Page 166 – Recovery discs; Windows XP Professional DVDs
  • Page 167 – Windows Vista Home Basic (32 bit) SP2 DVDs
  • Page 172 – Common service tools; Tool
  • Page 174 – Electronic emissions notices; User Guide
  • Page 175 – Trademarks
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ThinkPad T420 and T420i
Hardware Maintenance Manual

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Summary

Page 2 - under Appendix A “Notices” on page 167.

Note: Before using this information and the product it supports, be sure to read the general information under 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 ...

Page 3 - Contents; iii

Contents About this manual. . . . . . . . . . . iii Chapter 1. Safety information . . . . . . 1 General safety . . . . . . . . . . . . . . . . 1 Electrical safety . . . . . . . . . . . . . . . 2 Safety inspection guide . . . . . . . . . . . . 3 Handling devices that are sensitive to electrostaticdis...

Page 4 - ii

1160 LCD unit . . . . . . . . . . . . . . . 93 1170 Fan assembly . . . . . . . . . . . . . 97 1180 CPU . . . . . . . . . . . . . . . . 101 1190 Base cover assembly and DC-in connectorcable . . . . . . . . . . . . . . . . . . 102 1200 Magnesium structure frame . . . . . . . 106 1210 System board and ...

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