IBM 7940, Problem Determination And Service Manual

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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, 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.
Beep code Description Action
One continuous beep Microprocessor error.
1. Reseat the following components, one at a
time, in the order shown, restarting the
server each time:
v
(Trained service technician only)
Microprocessor 1
v (Trained service technician only)
Microprocessor 2 (if installed)
2. (Trained service technician only) Remove
microprocessor 2 and its VRM and restart
the server.
v
If no beep code occurs, microprocessor 2
might have failed; replace the
microprocessor.
v
If the beep code remains, remove
microprocessor 1 and install
microprocessor 2 in the connector for
microprocessor 1; then, restart the
server. If no beep code occurs,
microprocessor 1 might have failed;
replace the microprocessor.
3. Replace the following components, one at a
time, in the order shown, restarting the
server each time:
v (Trained service technician only)
Microprocessor 1
v
(Trained service technician only)
Microprocessor 2 (if installed)
v
(Trained service technician only) System
board
Repeating short beeps Keyboard error.
1. Make sure that nothing is resting on the
keyboard.
2. Reseat the keyboard cable.
3. Replace the following components one at a
time, in the order shown, restarting the
server each time:
a. Keyboard
b. (Trained service technician only) System
board
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IBM System x3455 Type 7940 and 7941: Problem Determination and Service Guide