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, System x3500 Type 7977,” on page 41 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 Action
CPU %d IERR, the CPU has been disabled Information only; if the message remains:
1. (Trained service technician only) Reseat the microprocessors.
2. Reseat the microprocessor VRMs, if any are present.
3. (Trained service technician only) Replace the microprocessor.
CPU %d non-critical over temperature warning
1. Make sure that the fans have good airflow and are not
obstructed.
2. (Trained service technician only) Reseat the microprocessor
heat sink.
CPU %d non-recoverable over temperature fault
1. Make sure that the fans have good airflow and are not
obstructed.
2. (Trained service technician only) Reseat the microprocessor
heat sink.
CPU removal detected Informational only; if the message remains:
1. (Trained service technician only) Reseat the microprocessors.
2. Reseat the microprocessor VRMs, if any are present.
CPU X Over Temperature
1. Check all fans and remove any obstacles from the path of the
airflow.
2. Make sure that the room temperature is within the
recommended range.
3. Make sure that the microprocessor heat sinks are correctly
seated.
Ethernet Data Rate modified from <value1> to
<value2> by user <USERID>
Information only
Ethernet Duplex setting modified from <value1>
to <value1> by user <USERID>
Information only
Ethernet interface <value> by user <USERID> Information only
Ethernet locally administered MAC address
modified from x:x:x:x:x:x
Information only
Ethernet MTU setting modified from x to y by
user <USERID>
Information only
Fan X Failure (X of 1-8)
1. Make sure that nothing is blocking the fan.
2. Check the physical connection and make sure that the fan is
correctly seated.
3. Replace fan X.
Fan X not detected (X of 1-8)
1. Make sure that nothing is blocking the fan or power supply.
2. Check the physical connection and make sure that the fan is
correctly seated.
3. Replace fan X.
Front Panel is not plugged in
1. Make sure that the operator information panel cables are
correctly connected (verify LED activity).
2. Replace the operator information panel.
154 IBM System x3500 Type 7977: Problem Determination and Service Guide
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