v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, “Parts listing, Type 8864,” on page 23 to determine which components are customer
replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by “(Trained service technician only)”, that step must be performed only by a
trained service technician.
System-error log message Action
QA Vcc PLL Power Good Fault
1. Reseat the microprocessor tray.
2. (Trained service technician only) Reseat the microprocessors.
3. Reseat the microprocessor VRMs, if present.
4. (Trained service technician only) Replace the microprocessor
tray.
QB Cache Power Good Fault
1. Reseat the microprocessor tray.
2. (Trained service technician only) Reseat the microprocessors.
3. Reseat the microprocessor VRMs, if present.
4. (Trained service technician only) Replace the microprocessor
tray.
QB Vcc PLL Power Good Fault
1. Reseat the microprocessor tray.
2. (Trained service technician only) Reseat the microprocessors.
3. Reseat the microprocessor VRMs, if present.
4. (Trained service technician only) Replace the microprocessor
tray.
Remote Login Successful. Login ID: Information only
Resetting system due to an unrecoverable error Check the following light path diagnostics LEDs for faults:
Note: Make sure you re-enable the memory in the
Configuration/Setup Utility program. See, “Memory problems” on
page 93
1. Microprocessors
2. DIMMs
3. Memory card
4. Microprocessor tray
5. I/O board assembly
SAS Backplane Configuration is incorrect
1. Reseat the SAS power/I2C cable (from the SAS board to the
PCIX board).
2. Replace the SAS power/I2C cable.
3. Replace the SAS backplane.
4. Replace PCIX board.
SCSI 1.8V Power Good Fault
1. Reseat the I/O board.
2. Replace the I/O board.
Single fan failure Replace any missing or failed fans or power supplies.
SMI reported a Machine Check on Memory Card Note: Make sure you re-enable the memory in the
Configuration/Setup Utility program. See, “Memory problems” on
page 93
1. Reseat the memory card.
2. Replace the memory card.
140 IBM System x3850 Type 8864: Problem Determination and Service Guide
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