Ingeniero En Sistemas

ThinkPad T400 and R400
Hardware Maintenance Manual

ThinkPad T400 and R400
Hardware Maintenance Manual

Note
Before using this information and the product it supports, be sure to read the general information under “Notices” on page
375.

Fifth Edition (September 2009)
© Copyright Lenovo 2008, 2009.
LENOVO products, data, computer software, and services have been developedexclusively at private expense and
are sold to governmental entities as commercial items as defined by 48 C.F.R. 2.101 with limited and restricted
rights to use, reproduction and disclosure.
LIMITED AND RESTRICTED RIGHTS NOTICE: If products, data, computer software, or services are delivered
pursuant a General Services Administration ″GSA″ contract, use, reproduction, or disclosure is subject torestrictions
set forth in Contract No. GS-35F-05925.
© Lenovo 2008, 2009

Contents
About this manual . . . . . . . . . . v
Safety information . . . . . . . . . . 1
General safety . . . . . . . . . . . . . . 2
Electrical safety . . . . . . . . . . . . . 3
Safety inspection guide . . . . . . . . . . . 5
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . .. 6
Grounding requirements . . . . . . . . . . 6
Safety notices (multilingual translations) . . . . . 7
Laser compliance statement (multilingual
translations) . . . . . . . . . . . . . . 28

Symptom-to-FRU index .
Numeric error codes .
Error messages . . .
Beep symptoms . . .
No-beep symptoms . .
LCD-related symptoms
Intermittent problems .
Undetermined problems

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Status indicators . . . . . . . . . . 71
Fn key combinations

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Important service information . . . . . 39

FRU replacementnotices . . . . . . . 79

Strategy for replacing FRUs . . . . . . . .
Strategy for replacing a hard disk drive . . .
Important notice for replacing a system board .
How to use error message . . . . . . .
Strategy for replacing FRUs for CTO, CMV, and
GAV. . . . . . . . . . . . . . . .
Product definition . . . . . . . . . .
FRU identification for CTO, CMV, and GAV
products . . . . . . . . .. . . .

Screw notices . . . . . . . . . . .
Retaining serial numbers . . . . . . .
Restoring the serial number of the system
Retaining the UUID . . . . . . .
Reading or writing the ECA information

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General checkout . . . . . . . . . . 43
What to do first . . . . . . . . .
Checkout guide . . . . . . . . .
Diagnostics using PC-Doctorfor DOS
Lenovo ThinkVantage Toolbox (Lenovo
Toolbox) . . . . . . . . . .
PC-Doctor for Windows . . . . .
PC-Doctor for Rescue and Recovery .
FRU tests . . . . . . . . . .
Power system checkout . . . . . .
Checking the AC adapter . . . . .
Checking operational charging . . .
Checking the battery pack . . . .
Checking the backup battery . . .

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Related service information . . . . . . 55
Restoring the factory contents by using Product
Recovery discs . . . . . . . . . . . .
Restoring the factory contents by using Recovery
Disc Set . . . . . . . . . . . . . .
Passwords . . . . . . . . . . . . . .
Power-on password . . . . . . .. .
Hard-disk password . . . . . . . . .
Supervisor password . . . . . . . . .
How to remove the power-on password . . .
How to remove the hard-disk password . . .
Power management . . . . . . . . . .
Screen blank mode . . . . . . . . . .
Sleep (Standby) mode . . . . . . . . .
Hibernation mode . . . . . . . . . .
© Copyright Lenovo 2008, 2009

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