Power Problems - IBM System x3800 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 3, "Parts listing, System x3800 Type 8865," on page 107 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 20
seconds after the server has
been connected to ac power.
58
IBM System x3800 Type 8865: Problem Determination and Service Guide
Action
1. Make sure that:
v The power cords are correctly connected to the server and to a working
electrical outlet.
v The power supplies are correctly latched into the server.
v The LEDs on the power supply do not indicate a problem. See
"Power-supply LEDs" on page 69.
v The microprocessors are installed in the correct sequence.
v The memory card is fully seated.
2. Reseat the following components:
a. Microprocessor tray
b. I/O board
c. Memory card
3. If you just installed an optional device or PCI-X card, remove it, and restart the
server. If the server now turns on, you might have installed more devices than
the power supply supports or installed a faulty device.
4. Make sure that the operator information panel power-control button 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 4a and
4b.
v If the server does not start, bypass the operator information panel
power-control button by using the force power-on jumper (see "I/O board
internal connectors and jumpers" on page 8); if the server starts, reseat the
operator information panel and if the problem remains, replace the operator
information panel.
v If the server does not start, by using the force power on jumper, then
replace:
a. Power backplane
b. Microprocessor tray
c. I/O board
d. PCI-X board
5. Make sure that the reset button is working correctly:
a. Disconnect the server power cords.
b. Reconnect the power cords.
c. Reseat the light path diagnostics panel cable, and then repeat steps 5a and
5b.
If the server starts, replace the operator information panel assembly.
6. Replace the components listed in step 2 one at a time, in the order shown,
restarting the server each time.
7. See "Solving undetermined problems" on page 104.