Symptom-to-FRU index
The Symptom-to-FRU index lists error symptoms and possible causes. The
most likely cause is listed first. Always begin with “General checkout” on
page 26. See “Chapter 1. IBM PC Enhanced Diagnostics error codes” on page 1
when running diagnostics. This index can also be used to help you decide
which FRUs to have available when servicing a computer. If you are unable to
correct the problem using this index, go to “Undetermined problems” on
page 90.
Notes
v
If you have both an error message and an incorrect audio response,
diagnose the error message first.
v
If you cannot run the diagnostic tests or you get a diagnostic error
code when running a test, but did receive a POST error message,
diagnose the POST error message first.
v
If you did not receive any error message, look for a description of
your error symptoms in the first part of this index.
v
Check all power supply voltages before you replace the system board.
(See “Power supply” on page 30.)
v
Check the hard disk drive jumper settings before you replace a hard
disk drive. (See “Hard disk drive jumper settings” on page 48.)
Important
1.
Some errors are indicated with a series of beep codes (see “Beep
symptoms” on page 70).
Type 6568/6569/6648/6649 computers default to come up quiet (no
beep and no memory count and checkpoint code display) when no
errors are detected by POST. To enable beep and memory count and
checkpoint code display when a successful POST occurs, do the
following:
a.
Select
Start Options
in the Configuration/Setup Utility program
(see “Setup Utility program” on page 41).
b.
Set
Power-On Self-Test
to
Enhanced
.
2.
The processor is a separate FRU from the system board; the processor
is not included with the system board FRU.
Chapter 2. Types 6568/6569/6648/6649
69
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