Chapter 7. Symptom-To-Fru Index; Hard Disk Drive Boot Error; Power Supply Problems - Lenovo ThinkCentre 7515 Maintenance Manual

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 43. 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 80.

Hard disk drive boot error

A hard disk drive boot error can have the following causes.

Power supply problems

If you suspect a power problem, use the following procedures.
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Notes:
1. If you have both an error message and an incorrect audio response, diagnose the error
message first.
2. 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.
3. If you did not receive any error message, look for a description of your error symptoms
in the first part of this index.
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.
Check/Verify
Check the following for proper installation.
v Power Cord
v On/Off Switch connector
v On/Off Switch Power Supply connector
v System Board Power Supply connectors
v Microprocessor(s) connection
Check the power cord for continuity.
Check the power-on switch for continuity.
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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