IBM 7940, Problem Determination And Service Manual

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4. Exit from the Configuration/Utility program, saving the new settings; then, restart
the server.
POST error codes
The following table describes the POST error codes and suggested actions to
correct the detected problems.
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.
Error code Description Action
101, 102 Tick timer internal interrupt, internal timer
channel 2
1. Reseat the system board
2. (Trained service technician only) Replace the
system board
151 Real-time clock error
1. Reseat the battery.
2. Clear CMOS memory. See “Recovering from a
BIOS update failure (Clearing CMOS)” on page
107 for information about how to clear CMOS
memory.
3. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. System-board battery
b. (Trained service technician only) System
board
161 Real-time clock battery error.
1. Run the Configuration/Setup Utility program.
2. Reseat the battery.
3. Clear CMOS memory. See “Recovering from a
BIOS update failure (Clearing CMOS)” on page
107 for information about how to clear CMOS
memory.
4. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. Battery
b. (Trained service technician only) System
board
Chapter 5. Diagnostics
77