IBM 689912U Hardware Maintenance Manual - Page 214

One beep and the appearance of text on the display indicates successful completion of the POST. More than one beep indicates that the POST detects an error. Note Type 6275, 6285, 6561, 6591, 6862, 6889, 6892, 6893 computers are default to come up quiet (No beep and no memory count and checkpoint code display) when no errors are detected by POST. To enable Beep and memory count and checkpoint code display when a successful POST occurs: 1. Enable Power on Status in setup. See "Setup Utility Program" on page 220. Error Code Format This section provides an explanation of the encoded non-SCSI and SCSI POST error codes. Error messages are displayed on the screen as three, four, five, eight, twelve, or thirteen digits. An "X" in an error message can be any number or letter. The shorter POST errors are highlighted in the Symptom-to-FRU Index. Some digits will represent different information for SCSI errors versus non-SCSI errors. The following figure shows which digits display the shorter POST errors. The figure also defines additional SCSI information. Notes Non-IBM device error codes and documentation supersede this list. Duplicate SCSI ID settings will cause misleading error symptoms or messages. RDDDPLSCB QEET Test state Error code Extension Qualifier Bus ( =internal 1=external Capacity of the device Slot number of the device LUN (usually PUN (SCSI ID Device Number Reserved Digit (usually ) 204 IBM PC 300/700, IntelliStation Series HMM