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