IBM 8668 Hardware Maintenance Manual - Page 115

Symptom-to-FRU index This index supports xSeries 232 servers. The Symptom-to-FRU lists symptoms, errors, and the possible causes. The most likely cause is listed first. Use this Symptom-to-FRU index to help you decide which FRUs to have available when servicing the computer. The POST BIOS displays POST error codes and messages on the screen. Beep Symptoms Beep symptoms are short tones or a series of short tones separated by pauses (intervals without sound). See the following examples. Beeps 1-2-3 4 Note: One beep after successfully completing POST indicates the system is functioning properly. Description v One beep v A pause (or break) v Two beeps v A pause (or break) v Three Beeps Four continuous beeps Beep/Symptom 1-1-2 (Processor register test failed) 1-1-3 (CMOS write/read test failed) 1-1-4 (BIOS ROM checksum failed) 1-2-1 (Programmable Interval Timer failed) 1-2-2 (DMA initialization failed) 1-2-3 (DMA page register write/read failed) 1-2-4 (RAM refresh verification failed) 1-3-1 (1st 64K RAM test failed) 1-3-2 (1st 64K RAM parity test failed) 2-1-1 (Secondary DMA register failed) FRU/Action 1. Optional Processor (if installed) 2. Processor 1. Battery 2. System Board 1. Recover BIOS 2. System Board 1. System Board 1. System Board 1. System Board 1. DIMM 2. System Board 1. DIMM 1. DIMM 2. Processor 3. System Board 1. System Board © Copyright IBM Corp. 2000, 2001 107