Power Problems - IBM x iDataPlex dx340 Series Problem Determination And 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 3, "Parts listing," on page 59 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 (the system-board tray
does not start).
The system-board tray does not
turn off.
The system-board tray
unexpectedly shuts down, and
the LEDs on the operator panel
are not lit.
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System x iDataPlex dx340 Types 6385, 6386, 6389, 7831, 7832, and 7834: Problem Determination and Service Guide
Action
1. Make sure that the operator panel power-control button is working correctly:
a. Disconnect the chassis power cord.
b. Reconnect the power cord.
c. Press the power-control button.
2. Make sure that:
v The power cord is fully seated in the power supply inlet and connected to a
working electrical outlet and that the power supply fan is working.
v The system-board tray contains the correct type of DIMMs.
v The DIMMs are correctly seated.
v The microprocessor is correctly installed.
3. Reseat the following components:
a. DIMMs
b. Power-supply cables to all internal components
c. Power supply
4. Replace the following components one at a time, in the order shown, restarting
the system-board tray each time:
a. DIMMs
b. Power supply
5. If you just installed an optional device, remove it, and restart the system-board
tray. If the system-board tray now starts, you might have installed more devices
than the power supply supports.
6. See "Solving undetermined problems" on page 57.
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 system-board tray by holding the power-control button for 5
seconds.
c. Restart the system-board tray.
d. If the system-board tray fails POST and the power-control button does not
work, disconnect the ac power cord for 20 seconds; then, reconnect the ac
power cord and restart the system-board tray.
2. (Trained service technician only) If the problem remains or if you are using an
ACPI-aware operating system, suspect the system board.
See "Solving undetermined problems" on page 57.