Chapter 6. Symptom-To-Fru Index; Power Supply Problems - Lenovo 3000 H305 Hardware Maintenance Manual

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 13. 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 27.

Power Supply Problems

If you suspect a power problem, use the following procedures.
Check/Verify
Check the following for proper
installation.
•
•
•
•
•
Check the power cord for continuity. Power Cord
Check the power-on switch for
continuity.
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.
Power Cord
On/Off Switch connector
On/Off Switch Power Supply
connector
System Board Power Supply
connectors
Microprocessor(s) connection
6

Chapter 6. Symptom-to-FRU Index

FRU/Action
Reseat connectors
Power-on Switch
21