Chapter 6. Symptom-to-FRU IndexSDRAM memory errors . . . . . . . . . . 70Hard disk drive boot error . . . . . . . . . 70Power Supply Errors . . . . . . . . . . . 71Diagnostic error codes . . . . . . . . . . . 72Beep symptoms . . . . . . . . . . . . . 90No-beep symptoms . . . . . . . . . . . . 92POST error codes . . . . . . . . . . . . 93Miscellaneous error messages . . . . . . . . 107Undetermined problems . . . . . . . . . . 109The Symptom-to-FRU index lists error symptoms and possible causes. The mostlikely cause is listed first. Always begin with ″General Checkout″ on page 1. Thisindex can also be used to help you decide which FRUs to have available whenservicing a computer. If you are unable to correct the problem using this index, goto “Undetermined problems” on page 109.Notes:v If you have both an error message and an incorrect audio response, diagnose the errormessage first.v If you cannot run the diagnostic tests or you get a diagnostic error code when running atest, but did receive a POST error message, diagnose the POST error message first.v If you did not receive any error message, look for a description of your error symptomsin the first part of this index.v Check the hard disk drive jumper settings before you replace a hard disk drive.Important:Some errors are indicated with a series of beep codes (see “Beep symptoms” on page 90).Type 2254, 2256, 2257, 6336, 6337, 6339, 6341, 6342, 6346, 6347, 6348 computers default tocome up quiet (no beep and no memory count and checkpoint code display) when noerrors are detected by POST. To enable beep and memory count and checkpoint codedisplay when a successful POST occurs, do the following:1. Select Start Options in the Configuration/Setup Utility program (see “Setup Utilityprogram” on page 10).2. Set Power-On Self-Test to Enhanced.The processor is a separate FRU from the system board; the processor is not included withthe system board FRU.© Copyright IBM Corp. 2000 69
