Contents
About this manual
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. iii
Introduction
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. 1
Important service information .
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Strategy for replacing FRUs .
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How to use error messages .
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Diskette compatibility matrix .
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Safety notices: multilingual translations .
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. 3
Safety information.
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. 13
General safety .
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Electrical safety
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Safety inspection guide .
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. 15
Handling devices that are sensitive to electorostatic
discharge
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Grounding requirements .
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Laser compliance statement.
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General descriptions
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. 21
Read this first .
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. 21
What to do first
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Related service information .
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Service web site .
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Restoring the preloaded system
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Passwords .
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Power management .
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Checkout guide
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Testing the computer .
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Detecting system information with PC-Doctor.
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Power system checkout .
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ThinkPad T20, T21, T22 and T23 series.
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Product overview .
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Specifications .
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. 43
Status indicators .
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FRU Tests .
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Fn key combinations .
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Symptom-to-FRU index .
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Numeric error codes .
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Error messages
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Beep symptoms
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No-beep symptoms
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LCD-related symptoms .
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Intermittent problems .
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Undetermined problems .
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FRU replacement notices
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Screw notices .
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. 56
Retaining serial numbers.
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Removing and replacing a FRU.
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1010 Battery pack.
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. 60
1020 Backup battery .
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. 61
© Copyright IBM Corp. 2002
v
Summary of Contents for ThinkPad T21
Page 4: ...iv ThinkPad T20 T21 T22 T23 MT 2647 2648...
Page 44: ...Checkout guide 38 ThinkPad T20 T21 T22 T23 MT 2647 2648...
Page 83: ...9 8 7 7 8 9 10 9 continued Removing and replacing a FRU ThinkPad T20 T21 T22 and T23 series 77...
Page 132: ...6 5 4 7 5 3 continued Removing and replacing a FRU 126 ThinkPad T20 T21 T22 T23 MT 2647 2648...
Page 181: ...Notices ThinkPad T20 T21 T22 and T23 series 175...
Page 182: ...Part Number 62P9631 1P P N 62P9631...
