IBM System x3650 Type 7979 Problem Determination And Service Manual page 88

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 7979 and 1914 server," on page 79 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
+5v critical over voltage fault
+5v critical under voltage fault
5V fault
+2.5v critical over voltage fault
+2.5v critical under voltage fault
+1.8v critical over voltage fault
70
IBM System x3650 Type 7979 and 1914: Problem Determination and Service Guide
Action
1. Remove the following devices, which are powered by 5 volts:
v All PCI adapters
v USB devices
v CD-RW/DVD drive
v Tape drive, if one is installed
v Hard disk drive backplane
2. Reinstall each I/O device removed in step 1, one at a time,
restarting the server each time, to isolate a defective device.
Replace any defective device.
3. If the error continues, replace the power backplane. Restart the
server.
4. If the error continues, (trained service technician only) replace
the system board.
1. Remove the following devices, which are powered by 5 volts:
v All PCI adapters
v USB devices
v CD-RW/DVD drive
v Tape drive, if one is installed
v Hard disk drive backplane
2. Reinstall each I/O device removed in step 1, one at a time,
restarting the server each time, to isolate a defective device.
Replace any defective device.
3. If the error continues, replace the power backplane. Restart the
server.
4. If the error continues, (trained service technician only) replace
the system board.
1. Remove the following devices, which are powered by 5 volts:
v All PCI adapters
v USB devices
v CD-RW/DVD drive
v Tape drive, if one is installed
v Hard disk drive backplane
2. Reinstall each I/O device removed in step 1, one at a time,
restarting the server each time, to isolate a defective device.
Replace any defective device.
3. If the error continues, replace the power backplane. Restart the
server.
4. If the error continues, (trained service technician only) replace
the system board.
Information only
Information only
Information only