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 24. See
“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 problem” on
page 104.
Notes
If you have both an error message and an
incorrect audio response, diagnose the error
message first.
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.
If you did not receive any error message, look for
a description of your error symptoms in the first
part of this index.
Check all power supply voltages before you
replace the system board. (See “Power supply”
on page 29.)
Check the hard disk drive jumper settings before
you replace a hard disk drive. (See “Hard disk
drive jumper settings” on page 51.)
Important
1. Some errors are indicated with a series of beep
codes. (See “Beep symptoms” on page 83.)
Type 6584/6594 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:
Enable Power on Status in setup. See
“Setup Utility program” on page 41.
2. The processor is a separate FRU from the
system board; the processor is not included with
the system board FRU.
82 IBM PC 300/IntelliStation Vol 3 HMM