Contents
About this manual ...........iii
Introduction .............1
Important service information .........1
Strategy for replacing FRUs ........1
How to use error messages ........2
Diskette compatibility matrix .........2
Safety notices: multilingual translations ......3
Safety information............13
General safety............13
Electrical safety ...........14
Safety inspection guide .........15
Handling devices that are sensitive to electorostatic
discharge ............16
Grounding requirements .........17
Laser compliance statement.........18
General descriptions ..........21
Read this first .............21
What to do first ...........21
Related service information .........23
Service web site ...........23
Restoring the preloaded system ......23
Passwords .............26
Power management ..........28
Checkout guide ............32
Testing the computer ..........33
Detecting system information with PC-Doctor. . . 34
Power system checkout .........35
ThinkPad T20, T21, T22 and T23 series.....39
Product overview ............41
Specifications ............43
Status indicators ...........45
FRU Tests .............47
Fn key combinations ..........48
Symptom-to-FRU index ..........49
Numeric error codes ..........49
Error messages ...........52
Beep symptoms ...........53
No-beep symptoms ..........53
LCD-related symptoms .........54
Intermittent problems ..........55
Undetermined problems .........55
FRU replacement notices .........56
Screw notices ............56
Retaining serial numbers.........57
Removing and replacing a FRU........59
1010 Battery pack...........60
1020 Backup battery ..........61
© Copyright IBM Corp. 2002
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