![background image](http://html.mh-extra.com/html/ibm/thinkpad-t20/thinkpad-t20_hardware-maintenance-manual_607480043.webp)
Symptom-to-FRU index
Symptom-to-FRU index
The symptom-to-FRU index in this section lists symptoms
and errors and their possible causes. The most likely
cause is listed first, in boldface type.
Note: Do the FRU replacement or other actions in the
sequence shown in the column headed “FRU or
action, in sequence.” If replacing a FRU does not
solve the problem, put the original part back in the
computer. Do not replace a nondefective FRU.
This index can also help you determine, during regular
servicing, what FRUs are likely to need to be replaced
next.
A numeric error is displayed for each error detected in
POST or system operation. In the displays, n can be any
number.
If no numeric code is displayed, check the narrative
descriptions of symptoms. If the symptom is not described
there, go to “Intermittent problems” on page 44.
Note: For an IBM device not supported by diagnostic
codes in the ThinkPad notebook computers,
see the manual for that device.
Numeric error codes
Symptom or error
FRU or action, in
sequence
0175
Bad CRC1, stop POST task.
The EEPROM checksum is
not correct.
System board.
0187
EAIA data access error
System board.
0188
Invalid RFID serialization
information area or bad
CRC2.
System board.
0189
Invalid RFID configuration
information area.
System board.
0190
Critical low battery error.
1. Charge the battery
pack.
2. Battery pack.
0193
RF antenna has been
removed.
Enter the supervisor
password.
ThinkPad T20
39
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 ...