Symptom-To-Fru Index; Numeric Error Codes - IBM ThinkPad T21 Hardware Maintenance Manual

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 55.
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
0175
Bad CRC1, stop POST
task—The EEPROM checksum
is not correct.
0187
EAIA data access error—The
access to EEPROM is failed.
0188
Invalid RFID serialization
information area or bad
CRC2—The EEPROM
checksum is not correct.
0189
Invalid RFID configuration
information area—The
EEPROM checksum is not
correct.
0190
Critical low-battery error
ThinkPad T20, T21, T22 and T23 series

Symptom-to-FRU index

FRU or action, in sequence
System board.
System board.
System board.
System board.
1. Charge the battery pack.
2. Battery pack.
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