Power Problems - IBM System x3750 M4 Installation And Service Manual

Power problems

This information provides steps for solving power problems.
Table 36. Symptoms and actions for 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 5, "Parts listing, System x3750 M4 Types 8722 and 8733," on page 215 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-on button does not
work, and the reset button does
work (the server does not start).
Note: The power-on button will
not function until
approximately 10 seconds after
the server has been connected
to ac power.
The server does not turn off
The server unexpectedly shuts
down, and the LEDs on the
operator information panel are
not lit.
The server goes directly to the
POST Event Viewer when it is
turned on.
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System x3750 M4 Types 8722 and 8733: Installation and Service Guide
Action
1. Make sure that the server has power by checking the ac power LED and the dc
power LED on the power supply. If both of the ac power LED and the dc
power LED are lit, reseat the power supply. If one of the LED is off, then see
"Power-supply LEDs" on page 179.
2. 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 can support.
3. Check the IMM event log and resolve any errors related to the device.
4. Make sure that the power interposer card is connected to the power supply
connector and the system board correctly.
5. Attempt to use the force power on jumper (see Table 3 on page 30). If the
server starts, replace the operator information panel and operator information
panel cable.
1. Determine whether you are using an Advanced Configuration and Power
Interface (ACPI) or a non-ACPI operating system. If you are using a non-ACPI
operating system, complete the following steps:
a. Press Ctrl+Alt+Delete.
b. Turn off the server by pressing the power-on button and holding it down
for 5 seconds.
c. Restart the server.
d. If the server fails POST and the power-on button does not work, disconnect
the ac power cord for 20 seconds; then, reconnect the ac power cord and
restart the server.
2. If the problem remains or if you are using an ACPI-aware operating system,
suspect the system board.
1. Check the IMM event log for errors and resolve any errors associated with the
device.
2. If you are unable to check the IMM event log, see the steps for "The
power-control button does not work, and the reset button does work (the
server does not start)." symptom in this table.
3. If the problem remains, see "Solving undetermined problems" on page 208.
Check the IMM event log and resolve any errors that has occurred.