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Chapter 7. 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 Chapter 4 "General Checkout" on page 33. 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 64.
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.
Hard disk drive boot error
A hard disk drive boot error can have the following causes.
Error
The start-up drive is not in the boot sequence in
configuration.
No operating system installed on the boot drive.
The boot sector on the startup drive is corrupted.
The drive is defective.
Power Supply Problems
If you suspect a power problem, use the following procedures.
Check/Verify
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
Check the power cord for continuity.
Check the power-on switch for continuity.
© Copyright Lenovo 2010, 2012
FRU/Action
Check the configuration and ensure the start-up drive is
in the boot sequence.
Install an operating system on the boot drive.
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.
Replace the hard disk drive.
FRU/Action
Reseat connectors
Power cord
Power-on switch
43
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