IBM THINKPAD A20M User Manual Page 3
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- Table of contents
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About this manual
This manual contains service and reference information for
IBM ThinkPad A20, A21, A22 (MT2628, 2629, 2633), and
ThinkPad Dock (MT2631) products. Use this manual along
with the advanced diagnostic tests to troubleshoot
problems.
The manual is divided into sections as follows:
v The common sections provide general information,
guidelines, and safety information required in servicing
computers.
v The product-specific section includes service, reference,
and product-specific parts information.
Important
This manual is intended for trained service
personnel who are familiar with ThinkPad products.
Use this manual along with the advanced diagnostic
tests to troubleshoot problems effectively.
Before servicing an IBM ThinkPad product, be sure
to review the safety information under “Safety
notices: multilingual translations” on page 3, “Safety
information” on page 14, and “Laser compliance
statement” on page 18.
© Copyright IBM Corp. 2001 iii
- IBM Mobile Systems 1
- ThinkPad Computer 1
- Hardware Maintenance Manual 1
- About this manual 3
- Contents 5
- Introduction 7
- How to use error messages 8
- Diskette compatibility matrix 8
- Safety notices 10
- Safety information 20
- General safety 20
- Electrical safety 21
- Safety inspection guide 22
- Handling electrostatic 23
- Grounding requirements 24
- Laser compliance statement 24
- General descriptions 29
- Read this first 30
- Related service information 31
- Service web site 31
- Product recovery program 31
- Passwords 33
- Power-on password: 34
- Hard-disk password: 34
- Supervisor password: 34
- Power management 36
- Hibernation mode 37
- Checkout guide 39
- Testing the computer 39
- PC-Doctor 41
- Power system checkout 41
- Checking the ac adapter 42
- Checking operational charging 42
- Checking the battery pack 43
- Checking the backup battery 43
- Black (-) 44
- ThinkPad A20m/p, A21m/p and 45
- Product overview 47
- Specifications 47
- Status indicators 50
- FRU tests 52
- Fn key combinations 54
- Symptom-to-FRU index 55
- Numeric error codes 55
- Error messages 58
- Beep symptoms 59
- No beep symptoms 59
- LCD-related symptoms 60
- Intermittent problems 61
- Undetermined problems 61
- 90 degrees more 62
- (Cross-section) 62
- 180 degrees more 62
- Retaining serial numbers 63
- FRU replacement notices 64
- 1010 Battery pack 66
- 1020 DIMM 67
- 1030 Mini PCI adapter 69
- For A20m/p, A21m/p series 70
- For A22m/p series 71
- 1040 Backup battery 72
- Step Screw (quantity) 73
- 1060 Ultrabay 2000 device 75
- 1070 Keyboard 77
- 1080 Keyboard CRU insulator 80
- Step Screw (quantity) Torque 81
- (4 kgfcm) 81
- 1120 Sub card 86
- 1130 PC Card slot assembly 88
- 1140 Fan assembly 89
- 1150 Diskette drive 91
- 1160 Upper shield 93
- 1170 TV card 94
- 1180 CPU socket and CPU 95
- 1190 System board and RJ45/11 97
- For A20m/p and A21m/p series 98
- Thermal rubbers location 99
- 2010 LCD assembly 100
- 2020 Front bezel 102
- 14.1-in. and 15.0-in. panels 103
- (LG)” on page 138 104
- 2030 Inverter card 105
- 2040 LCD panel 107
- (continued) 108
- Removing and replacing a FRU 110
- 3010 ThinkPad Dock PCI cover 111
- 3020 ThinkPad Dock top cover 113
- (Bottom view) 114
- Locations 118
- Front view 118
- Rear view 119
- Bottom view 120
- Parts list 121
- A series model matrix 121
- *1: Memory 128 MB 122
- AC adapter 142
- LCD FRUs 142
- 14.1-in. XGA TFT 143
- 15.0-in. XGA TFT (LG) 144
- 15.0-in. XGA TFT (SAMSUNG) 144
- 15.0-in. SXGA+ TFT 145
- 15.0-in. UXGA TFT 145
- Keyboard 146
- Recovery CDs 147
- For Windows 98 (A22p) 148
- For Windows 2000 (A22m) 149
- For Windows 2000 (A22p) 149
- Miscellaneous parts 151
- Optional FRUs 153
- Common parts list 154
- Power cords (docking station) 155
- Trademarks 156
- Part Number: 23P0896 158
- (1P) P/N: 23P0896 158
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