Lenovo ThinkPad i Series 1800 ThinkPad A2* Series Hardware Maintenance Manual - Page 5

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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 14 General safety 14 Electrical safety 15 Safety inspection guide 16 Handling electrostatic discharge-sensitive devices 17 Grounding requirements 18 Laser compliance statement 18 General descriptions 23 Read this first 23 What to do first 23 Related service information 25 Service web site 25 Product recovery program 25 Passwords 27 Power management 30 Checkout guide 33 Testing the computer 33 Detecting system information with PC-Doctor. . . 35 Power system checkout 35 ThinkPad A20m/p, A21m/p and A22m/p. . . . . 39 Product overview 41 Specifications 41 Status indicators 44 FRU tests 46 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 DIMM 61 1030 Mini PCI adapter 63 © Copyright IBM Corp. 2001 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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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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Safety notices: multilingual translations
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Safety information
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14
General safety
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Electrical safety
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15
Safety inspection guide
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16
Handling electrostatic discharge-sensitive devices
17
Grounding requirements
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18
Laser compliance statement
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General descriptions
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Read this first
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What to do first
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Related service information
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Service web site
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Product recovery program
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Passwords
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27
Power management
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Checkout guide
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33
Testing the computer
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Detecting system information with PC-Doctor.
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Power system checkout
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35
ThinkPad A20m/p, A21m/p and A22m/p
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39
Product overview
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Specifications
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Status indicators
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44
FRU tests
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46
Fn key combinations
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48
Symptom-to-FRU index
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49
Numeric error codes
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Error messages
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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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55
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 DIMM
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61
1030 Mini PCI adapter
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63
© Copyright IBM Corp. 2001
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