IBM 8688 - page 165

Service Processor message FRU/action
12V A Bus Fault
1. Memory board VRM
2. Power backplane
3. Power cables
4. Memory board
5. Midplane board
12V B Bus Fault
1. Microprocessor 3 power module
2. Microprocessor 3 power module cable
3. Processor-board assembly
4. Power backplane
5. Power cables
6. Midplane board
12V C Bus Fault
1. Microprocessor 2 power module
2. Microprocessor 2 power module cable
3. Processor-board assembly
4. Power backplane
5. Power cables
6. Midplane board
12V D Bus Fault
1. Microprocessor 4 power module
2. Microprocessor 4 power module cable
3. Processor-board assembly
4. Power backplane
5. Power cables
6. Midplane board
12V E Bus Fault
1. Fans
2. Midplane-board VRM
3. Processor board
4. Power backplane
5. Power cables
6. Midplane board
7. I/O board
12V F Bus Fault
1. Microprocessor 1 power module
2. Microprocessor 1 power module cable
3. Processor-board assembly
4. Power backplane
5. Power cables
6. Midplane board
12V G Bus Fault
1. PCI-X board
2. Power backplane
3. Power cables
4. Midplane board
Chapter 6. Symptom-to-FRU index 155