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 4364, 4365, or 4366 server,” on page 15 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-event/error log message Action
System shutoff due to continuous +5v over
voltage.
1. Reseat the following components:
a. (Trained service technician only) System board
b. Power supply
2. (Trained service technician only) Replace the system board.
System shutoff due to continuous +5v under
voltage.
1. Reseat the following components:
a. (Trained service technician only) System board
b. Power supply
2. (Trained service technician only) Replace the system board.
System shutoff due to VRM 1 over voltage.
1. (Trained service technician only) Reseat the microprocessor.
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. (Trained service technician only) Microprocessor
b. (Trained service technician only) System board
System shutoff due to VRM 1 under voltage.
1. (Trained service technician only) Reseat the microprocessor.
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. (Trained service technician only) Microprocessor
b. (Trained service technician only) System board
System shutoff due to +2.5v under voltage.
1. Reseat the following components:
a. (Trained service technician only) System board
b. Power supply
2. (Trained service technician only) Replace the system board.
System shutoff due to CPU over temperature.
1. Make sure that the fans have good airflow and are not
obstructed.
2. (Trained service technician only) Reseat the microprocessor
heat-exchanger assembly.
System shutoff due to board over temperature.
1. Make sure that the fans have good airflow and are not
obstructed.
2. (Trained service technician only) Reseat the system board.
3. (Trained service technician only) Replace the system board.
System under recommended voltage on
continuous +5v.
1. Reseat the following components:
a. (Trained service technician only) System board
b. Power supply
2. (Trained service technician only) Replace the system board.
System under recommended voltage for +12v.
1. Reseat the following components:
a. (Trained service technician only) System board
b. Power supply
2. (Trained service technician only) Replace the system board.
Chapter 5. Diagnostics 111
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