Power Problems - IBM x3690 X5 Service Manual

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 4, "Parts listing, System x3690 X5 Types 7147, 7148, 7149, and 7192," on page 249 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
The power-control button does
not work, and the reset button
does work (the server does not
start).
Note: The power-control button
will not function until
approximately 1 to 3 minutes
after the server has been
connected to ac power.
62
System x3690 X5 Types 7147, 7148, 7149, and 7192: Problem Determination and Service Guide
Action
1. Make sure that the top cover is closed and latched correctly.
2. Make sure that the top cover/power cut-off switch cable is seated correctly.
3. Make sure that the power-control button on the server is working correctly:
a. Disconnect the server power cords.
b. Reconnect the power cords.
c. Reseat the operator information panel cables, and then repeat steps 3a and
3b.
v If the server starts, reseat the operator information panel. If the problem
remains, replace the operator information panel.
v If the server does not start, bypass the power-control button by using
the force power-on jumper (see "Server internal LEDs, connectors, and
jumpers" on page 18). If the server starts, reseat the operator
information panel. If the problem remains, replace the operator
information panel.
4. Make sure that the reset button is working correctly:
a. Disconnect the server power cords.
b. Reconnect the power cords.
c. Reseat the operator information panel cable, and then repeat steps 3a and
3b.
v If the server starts, replace the operator information panel.
v If the server does not start, go to step 5.
5. Make sure that:
v The power cords are correctly connected to the server and to a working
electrical outlet.
v The type of memory that is installed is correct.
v The DIMMs are fully seated.
v The LEDs on the power supply do not indicate a problem.
v The microprocessors are installed in the correct sequence.
6. Reseat the following components:
a. DIMMs
b. Power supplies
c. Top cover/power cut-off switch cable
7. Replace the components listed in step 6 one at a time, in the order shown,
restarting the server each time.
8. 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.
9. See "Power-supply LEDs" on page 78.
10. See "Solving undetermined problems" on page 245.