IBM System x3610, Problem Determination And Service Manual

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Power 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 7942 server,” on page 37 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.
Symptom Action
The power-control button does
not work (the server does not
start).
Note: The power-control button
will not function until 20
seconds after the server has
been connected to power.
1. Make sure that:
v The power cords are correctly connected to the server and to a working
electrical outlet.
v The LED on the power supply does not indicate a problem.
v
The type of memory that is installed is correct.
v The microprocessors are installed in the correct sequence (make sure that a
microprocessor is in socket 1).
2. Make sure that the power-control button is working correctly:
a. Disconnect the server power cords.
b. Reseat the operator information panel assembly cable.
c. Reconnect the power cords.
d. Press the power-control button to restart the server. If the button does not
work, replace the operator information panel assembly.
3. If you just installed an optional device, remove it, and restart the server. If the
server now starts, you might have installed more devices than the power supply
supports.
4. Reseat the power backplane and power backplane cables; then, restart the
server.
5. Replace the power backplane and restart the server.
6. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Power supplies
b. (Trained service technician only) System board
7. See “Solving power problems” on page 108.
8. See “Solving undetermined problems” on page 110.
The server does not turn off.
1. Turn off the server by pressing the power-control button for 5 seconds.
2. Restart the server.
3. If the server fails POST and the power-control button does not work, disconnect
the power cord for 20 seconds; then, reconnect the power cord and restart the
server.
4. If the problem remains, suspect the system board.
The server unexpectedly shuts
down, and the LEDs on the
operator information panel are
not lit. See “Solving undetermined problems” on page 110.
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IBM System x3610 Type 7942: Problem Determination and Service Guide