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Contents
Chapter 1. Introduction ..........1
Importantserviceinformation.........1
FRU replacement strategy ........1
Hard disk drive replacement strategy .....2
How to use error messages ........2
How to read POST error messages ......2
Safety notices: multilingual translations ......3
Safetyinformation............12
General safety............12
Electricalsafety...........13
Safety inspection guide .........14
Handling electrostatic discharge-sensitive devices 15
Grounding requirements .........16
Laser compliance statement.........17
Laser radiation.............18
Chapter 2. General descriptions .......21
Read this first .............21
Relatedserviceinformation.........24
ServiceWebsite...........24
Product recovery program ........24
Using Recovery CD ..........25
Creating a Recovery Repair diskette .....26
Passwords .............26
Power management ..........28
Checkout guide ............32
Testing the computer ..........34
Detecting system information with PC-Doctor. . . 35
Power system checkout .........38
Chapter 3. ThinkPad X20, X21, X22, X23, X24 . . . 39
Product overview ............42
Specifications ............42
Statusindicators...........45
Fn key combinations ..........47
Symptom-to-FRU index ..........48
Numeric error codes ..........48
Error messages ...........50
Beep symptoms ...........51
LCD-related symptoms .........52
Intermittentproblems..........52
Undetermined problems .........53
FRU replacement notices .........54
Screwnotices............54
Retaining serial numbers.........55
Removing and replacing a FRU........57
1010 Battery pack...........58
1020 DIMM ............59
1030 Backup battery ..........60
1040 Hard disk drive ..........61
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