Chapter 7. Symptom-to-FRU Index
The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed rst.
Always begin with Chapter 4 General Checkout on page 31. 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 59.
Notes
:
If you have both an error message and an incorrect audio response, diagnose the error message rst.
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 rst.
If you did not receive any error message, look for a description of your error symptoms in the rst part of this index.
Hard disk drive boot error
A hard disk drive boot error can have the following causes.
Error
FRU/Action
The start-up drive is not in the boot sequence in
con guration.
Check the con guration and ensure the start-up drive is
in the boot sequence.
No operating system installed on the boot drive.
Install an operating system on the boot drive.
The boot sector on the startup drive is corrupted.
The drive must be formatted. Do the following:
1. Attempt to back up the data on the failing hard disk
drive.
2. Using the operating system programs, format the
hard disk drive.
The drive is defective.
Replace the hard disk drive.
Power Supply Problems
If you suspect a power problem, use the following procedures.
Check/Verify
FRU/Action
Check the following for proper installation.
Power cord
On/Off switch connector
On/Off switch power supply connector
System board power supply connectors
Microprocessor(s) connection
Reseat connectors
Check the power cord for continuity.
Power cord
Check the power-on switch for continuity.
Power-on switch
Beep symptoms
Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST.
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