Lenovo ThinkPad 770 Hardware Maintenance Manual for 770 series notebooks(Janua - Page 58

Symptom-to-FRU Index, Numeric Error Codes, FRUs to be replaced when servicing a computer. - service manual

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SYMPTOM-TO-FRU INDEX Symptom-to-FRU Index The symptom-to-FRU index lists the symptoms and errors and their possible causes. The most likely cause is listed first. Note Perform the FRU replacement or actions in the sequence shown in the "FRU/Action in Sequence" column. If a FRU replacement did 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 the next possible FRUs to be replaced when servicing a computer. Numeric error codes show the errors detected in POST or system operation. In the following error codes, X can be any number. If no codes are available, use narrative symptoms. If the symptom is not listed, go to "Undetermined Problems" on page 66. Note For IBM devices not supported by diagnostic codes in the ThinkPad notebook computers, see the manual for that device. Numeric Error Codes Symptom / Error FRU / Action in Sequence 10X 101: Interrupt failure. 102: Timer failure. 103: Timer interrupt failure. 104: Protected mode failure. 105: Last 8042 command not accepted. 107: NMI test failure. 108: Timer bus test failure. 109: Low meg-chip select test. 1. System board 52

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SYMPTOM-TO-FRU INDEX
Symptom-to-FRU Index
The symptom-to-FRU index lists the symptoms and errors
and their possible causes.
The most likely cause is listed
first.
Note
Perform the FRU replacement or actions in the
sequence shown in the “FRU/Action in Sequence”
column.
If a FRU replacement did 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 the next possible
FRUs to be replaced when servicing a computer.
Numeric error codes show the errors detected in POST or
system operation.
In the following error codes,
X
can be
any number.
If no codes are available, use narrative symptoms.
If the symptom is not listed, go to “Undetermined
Problems” on page
66.
Note
For IBM devices not supported by diagnostic codes in
the ThinkPad notebook computers, see the manual for
that device.
Numeric Error Codes
Symptom / Error
FRU / Action in Sequence
10X
101: Interrupt failure.
102: Timer failure.
103: Timer interrupt
failure.
104: Protected mode
failure.
105: Last 8042
command not
accepted.
107:
NMI test failure.
108:
Timer bus test
failure.
109: Low meg-chip
select test.
1.
System board
52