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 7940 and 7941 servers,” on page 19 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.
BMC log message
Sensor
type
Sensor
number
Action
PS 1 Fan Fault Asserted
04h
73h
1. Make sure that there are no obstructions,
such as bundled cables, to the airflow on
the power-supply fan.
2. (Trained service technician only) Replace
the power supply.
PS 1 Fan Fault Deasserted
04h
73h
Information only
PS 1 Thermal Fault Asserted
08h
77h
Information only
PS 1 Thermal Fault Deasserted
08h
77h
Information only
CPU 1 Prochot Asserted
CPU 2 Prochot Asserted
07h
07h
C0h
C1h
1. Make sure that the fans are operating,
that there are no obstructions to the
airflow, that the air baffles are in place and
correctly installed, and that the server
cover is installed and completely closed.
2. (Trained service technician only) Make
sure that the heat sink for CPU n is
installed correctly.
3. (Trained service technician only) Replace
CPU n.
4. (Trained service technician only) Replace
the system board.
CPU 1 Prochot Deasserted
CPU 2 Prochot Deasserted
07h
07h
C0h
C1h
Information only
System Power off Asserted
09h
01h
Information only
System Power off Deasserted
09h
01h
Information only
SEL 100% Full Asserted
SEL over 90% Full Asserted
SEL over 75% Full Asserted
B6h
B6h
B6h
01h
01h
01h
Information only
SEL 100% Full Deasserted
SEL over 90% Full Deasserted
SEL over 75% Full Deasserted
B6h
B6h
B6h
01h
01h
01h
Information only
CPU 1 DIMM 1A DIMM Single-Bit Error
CPU 1 DIMM 1B DIMM Single-Bit Error
CPU 1 DIMM 2A DIMM Single-Bit Error
CPU 1 DIMM 2B DIMM Single-Bit Error
CPU 1 DIMM 3A DIMM Single-Bit Error
CPU 1 DIMM 3B DIMM Single-Bit Error
CPU 2 DIMM 1A DIMM Single-Bit Error
CPU 2 DIMM 1B DIMM Single-Bit Error
CPU 2 DIMM 2A DIMM Single-Bit Error
CPU 2 DIMM 2B DIMM Single-Bit Error
CPU 2 DIMM 3A DIMM Single-Bit Error
CPU 2 DIMM 3B DIMM Single-Bit Error
0Ch
0Ch
0Ch
0Ch
0Ch
0Ch
0Ch
0Ch
0Ch
0Ch
0Ch
0Ch
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
Information only
114
IBM System x3455 Type 7940 and 7941: Problem Determination and Service Guide
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