IBM x3550 User Manual

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 7978 and 1913 server,” on page 29 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
+5v critical over voltage fault
1. Remove the following devices, which are powered by 5 volts:
v All PCI adapters
v USB devices
v CD-RW/DVD drive
v (Trained service technician only) 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, (trained service technician only) replace
the power backplane. Restart the server.
4. If the error continues, (trained service technician only) replace
the system board.
+5v critical under voltage fault
1. Remove the following devices, which are powered by 5 volts:
v All PCI adapters
v USB devices
v CD-RW/DVD drive
v (Trained service technician only) 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, (trained service technician only) replace
the power backplane. Restart the server.
4. If the error continues, (trained service technician only) replace
the system board.
5V fault
1. Remove the following devices, which are powered by 5 volts:
v All PCI adapters
v USB devices
v CD-RW/DVD drive
v (Trained service technician only) 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.
+2.5v critical over voltage fault Information only
+2.5v critical under voltage fault Information only
+1.8v critical over voltage fault Information only
+1.8v critical under voltage fault Information only
The system real time clock battery is no longer
reliable.
Replace the battery.
160 IBM System x3550 Type 7978 and 1913: Problem Determination and Service Guide

IBM x3550 Specifications

General

Brand	IBM
Model	x3550
Category	Server
Language	English