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v
Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
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See Chapter 7, “Parts listing, ThinkServer RD220 Type 3729, 3779, 3797, and 3798,” on page 231 to
determine which components are customer replaceable units (CRU) and which components are field
replaceable units (FRU).
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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
+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.
+3.3v critical over voltage fault
1. Remove all PCI adapters.
2. Reinstall each PCI adapter, one at a time, restarting the server
each time, to isolate a defective adapter. Replace any defective
adapter.
3. If the error continues, (trained service technician only) replace
the system board.
+3.3v critical under voltage fault
1. Remove all PCI adapters.
2. Reinstall each PCI adapter, one at a time, restarting the server
each time, to isolate a defective adapter. Replace any defective
adapter.
3. If the error continues, (trained service technician only) replace
the system board.
3.3V Bus Fault
1. Remove all PCI adapters.
2. Reinstall each PCI adapter, one at a time, restarting the server
each time, to isolate a defective adapter. Replace any defective
adapter.
3. If the error continues, (trained service technician only) replace
the system board.
Power Good Fault
1. Reseat the power supplies.
2. If the error continues, replace the power backplane.
VRM 1 Power Good Fault
1. (Trained service technician only) Reseat microprocessor 1.
2. (Trained service technician only) Replace microprocessor 1.
3. (Trained service technician only) Replace the system board.
VRM 2 Power Good Fault
1. (Trained service technician only) Reseat microprocessor 2.
2. (Trained service technician only) Replace microprocessor 2.
3. (Trained service technician only) Replace the system board.
VRM 2 is present
Information only
VRM 2 is not present
If microprocessor 2 is installed, (trained service technician only)
replace the system board.
Memory Area non-critical over temperature
warning
1. Make sure that the fans are operating and are not obstructed.
2. Make sure that the air baffles are in place and correctly
installed.
3. Make sure that the server cover is installed and fully closed.
Chapter 5. Diagnostics
139
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