Chapter 9. Symptom-To-Fru Index; Hard Disk Drive Boot Error; Power Supply Problems - Lenovo ThinkStation D20 Hardware Maintenance Manual

Chapter 9. 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 75.
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 start-up 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.
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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 systems programs, format the
hard disk drive.
Replace the hard disk drive.
FRU/Action
Reseat connectors
Power Cord
Power-on Switch
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