IBM 6645, 6644, 6646 manual

“Action/FRU” column. When servicing a system, always begin with “Start” on page 31.

If you are unable to correct the problem using these two index tables, go to “Undetermined Problems” on page 72.

NOTE:

1.If an error message and incorrect audio response occur, diagnose the error message first.

2.If you cannot run the diagnostics program tests but did receive a POST error code and message, use “Table 2-1 POST Error Codes and Messages List” on page 38 to diagnose system problems.

3.If you cannot run the diagnostics program tests but did receive a POST error beeps, use See “Table 2- 2 BIOS Error Beeps List” on page 45 to diagnose system problems.

4.If you did not receive any error message, look for a description of your error symptoms in “Table 2-3Error Symptoms List” on page 48.

IMPORTANT: Check all power supply voltages, switch, and jumper settings before you replace the system board. Also check the power supply voltages if you have a “system no-power” condition.

5.If you are unable to correct the problem by using the “BIOS Error Codes, Messages, and Beeps List” table and “Error Symptoms List” table, go to “Undetermined Problems” on page 72.

Check Procedures 37