IBM 621410U Hardware Maintenance Manual - Page 115
Beep/Symptom, FRU/Action, Battery, Jumper on J28, System board, Processor
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Page 115 highlights
Beep/Symptom FRU/Action 2-2-3 (CMOS power failure and checksum checks failed) 1. Battery 2. System board 2-2-4 (CMOS configuration info validation failed) 1. Battery 2. System board 2-3-1 (Screen initialization failed) 1. Jumper on J28 2. System Board 2-3-2 1. System board (Screen memory failed) 2-3-3 1. System board (Screen retrace failed) 2-3-4 1. System board (Search for video ROM failed) 2-4-1 1. System board (Video failed, screen believed operable) 3-1-1 1. System Board (Timer tick interrupt failed) 3-1-2 1. System Board (Interval timer channel 2 failed) 3-1-3 (RAM test failed above address OFFFFH) 1. DIMM 2. Memory card 3. System board 3-1-4 (Time-of-Day clock failed) 1. Battery 2. System Board 3-2-1 1. System board (Serial port failed) 3-2-2 1. System board (Parallel port failed) 3-2-3 (Math coprocessor failed) 1. Processor 2. System board Symptom-to-FRU index 107