IBM System x3950 Type 8878 Service Manual page 157

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 8878 and 8879," 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
Power Supply X 12V Over Voltage Fault
Power Supply X 12V Under Voltage Fault
Power Supply X AC Power Removed
Power Supply X Current Fault
Power Supply X DC Good Fault
Power Supply X Removed
Power Supply X Temperature Fault
Action
1. Reseat the following components:
a. Power supply
b. Power backplane
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. Power supply
b. (Trained service technician only) Power backplane
1. Reseat the following components:
a. Power supply
b. Power backplane
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. Power supply
b. (Trained service technician only) Power backplane
1. Connect the ac power cord to power supply X.
2. Replace power supply X.
1. Reseat the following components:
a. Power supply
b. Power backplane
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. Power supply
b. (Trained service technician only) Power backplane
1. If the power-on LED is lit, reduce the server to the minimum
configuration (see page 158) and replace components one at a
time to isolate the fault.
2. Reseat the following components:
a. Power supply
b. Power backplane
3. Replace the components listed in step 2 one at a time, in the
order shown, restarting the server each time.
1. Reseat power supply X.
2. Replace power supply X.
3. Replace the power backplane.
1. Make sure that the fan air intake areas are clear and well
ventilated.
2. Make sure that all fans are installed and functioning.
3. Reseat power supply X.
4. Replace power supply X.
141
Chapter 5. Diagnostics