Lenovo ThinkServer RD220 Hardware Maintenance Manual page 125

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See Chapter 7 "Parts listing, ThinkServer RD220 Type 3729, 3779, 3797, and 3798" on page 205 to determine
which components are customer replaceable units (CRU) and which components are field replaceable
units (FRU).
• 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
Action
1. Remove the following devices, which are powered by 5 volts:
• All PCI adapters
• USB devices
• CD-RW/DVD drive
• Tape drive, if one is installed
• Hard disk drive backplane
2. Reinstall each I/O device removed in step 1 on page 119, 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:
• All PCI adapters
• USB devices
• CD-RW/DVD drive
• Tape drive, if one is installed
• Hard disk drive backplane
2. Reinstall each I/O device removed in step 1 on page 119, 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:
• All PCI adapters
• USB devices
• CD-RW/DVD drive
• Tape drive, if one is installed
• Hard disk drive backplane
2. Reinstall each I/O device removed in step 1 on page 119, 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.
119
.
Chapter 5 Diagnostics