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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.
v See Chapter 3, "Parts listing, System x3755 Type 8877 and 7163," on page 25 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
5V Bus Fault
5V Planar over voltage
5V Planar under voltage
Application Posted Alert to ASM
CPU X non-critical over temperature warning
CPU X non-recoverable over temperature fault
CPU removal detected
CPU X Over Temperature
Ethernet Data Rate modified from <value1> to
<value2> by user <USERID>
Ethernet Duplex setting modified from <value1>
to <value1> by user <USERID>
Ethernet interface <value> by user <USERID>
Ethernet locally administered MAC address
modified from x:x:x:x:x:x
Action
(Trained service technician only) Replace the I/O board, see
"Removing the I/O board assembly" on page 68 and "Replacing
the I/O board assembly" on page 69.
(Trained service technician only) Replace the I/O board, see
"Removing the I/O board assembly" on page 68 and "Replacing
the I/O board assembly" on page 69.
(Trained service technician only) Replace the I/O board, see
"Removing the I/O board assembly" on page 68 and "Replacing
the I/O board assembly" on page 69.
Information only
1. Make sure that the fans have good airflow and are not
obstructed.
2. Reseat the microprocessor/memory card. See "Removing a
microprocessor/memory card" on page 51 and "Replacing a
microprocessor/memory card" on page 51.
3. Reseat the microprocessor and heat sink.
1. Make sure that the fans have good airflow and are not
obstructed.
2. Reseat the microprocessor/memory card. See "Removing a
microprocessor/memory card" on page 51 and "Replacing a
microprocessor/memory card" on page 51.
3. Reseat the microprocessor and heat sink.
4. Replace the microprocessor/memory card. See "Removing a
microprocessor/memory card" on page 51 and "Replacing a
microprocessor/memory card" on page 51.
Information only. If the message remains, reseat the
microprocessor/memory cards, see "Removing a
microprocessor/memory card" on page 51 and "Replacing a
microprocessor/memory card" on page 51.
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.
Information only
Information only
Information only
Information only
145
Chapter 5. Diagnostics
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