IBM 8646 Hardware Maintenance Manual - Page 100
Beep/Symptom, FRU/Action, System Board, Battery, Jumper on J28, 1st 64K RAM
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Page 100 highlights
Beep/Symptom FRU/Action 1-2-3 (DMA page 1. System Board register write/read test failed) 1-2-4 (RAM refresh verification failed) 1. DIMM 2. System Board 1-3-1 (1st 64K RAM test 1. DIMM failed) 2. System Board 1-3-2 (1st 64K RAM parity test failed) 1. DIMM 2. Processor 3. System Board 1-4-3 (Interrupt vector 1. System Board loading test failed) 2-1-1 (Secondary DMA 1. System Board register failed) 2-1-2 (Primary DMA register failed) 1. System Board 2-1-3(Primary interrupt 1. System Board mask register failed) 2-1-4 (Secondary 1. System Board interrupt mask register failed) 2-2-1 (Interrupt vector 1. System Board loading failed) 2-2-2 (Keyboard controller failed) 1. System Board 2. Keyboard 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 (Screen memory 1. System board failed) 2-3-3 (Screen retrace failed) 1. System board 2-3-4 (Search for video 1. System board ROM failed) 2-4-1 (Video failed; screen believed operable) 1. System board 3-1-1 (Timer tick interrupt failed) 1. System Board 3-1-2 (Interval timer channel 2 failed) 1. System Board 92 Hardware Maintenance Manual: xSeries 220 Type 8646
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