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Product overview
The following table shows the test for each FRU.
FRU
Applicable test
System
board
1. Diagnostics -->
CPU/Coprocessor
2. Diagnostics --> Systemboard
Power
Diagnostics --> IBM AC Adapter, IBM
Battery 1 IBM Battery 2 in Other
Devices
LCD unit
1. Diagnostics --> Video Adapter
2. Interactive Tests --> Video
Modem
1. Make sure the modem is set up
correctly.
2. Replace the modem jack and the
modem card in turn, and run the
following test in Other Devices
(Diagnostics):
a. Modem Register Test
b. Modem DTMF/LoopBack
Test
c. Internal Modem Register
d. Internal Modem
LoopBack/DTMT
Audio
1. Interactive Tests --> Internal
Speaker
2. Diagnostics --> Crystal
SoundFusion
Test in Other
Devices
Speaker
Interactive Tests --> Internal Speaker
PC Card
slots
Diagnostic --> PCMCIA, PCMCIA
External Loop in Systemboard
Keyboard
1. Diagnostics --> Keyboard in
Systemboard
2. Interactive Test --> Keyboard
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ThinkPad T20 HMM
Summary of Contents for ThinkPad T20
Page 1: ...S19K 2331 00 IBM Mobile Systems ThinkPad T20 2647 2648 Hardware Maintenance Manual March 2000 ...
Page 34: ...Checkout guide 30 ThinkPad T20 HMM ...
Page 64: ...Removing and replacing a FRU 6 5 4 4 5 6 7 6 60 ThinkPad T20 HMM ...
Page 88: ...Removing and replacing a FRU 3010 ThinkPad Dock PCI cover 1 1 2 84 ThinkPad T20 HMM ...
Page 92: ...Removing and replacing a FRU The release button works correctly 88 ThinkPad T20 HMM ...
Page 108: ...IBM Part Number 19K2331 Printed in U S A S19K 2331 ðð ...