IBM 2647 Hardware Maintenance Manual - Page 5

Contents, About this manual, Introduction, General descriptions, ThinkPad T20, T21, T22 and T23 series - battery

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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 v

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