Power Problems - IBM IntelliStation M Pro 6218 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 65 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,
if supported, does work.
The computer does not start.
The computer does not turn off.
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IBM IntelliStation M Pro Type 6218 and 9236: Problem Determination and Service Guide
Action
1. (Trained service technician only) Reseat the power switch/LED assembly cable.
2. Replace the following components one at a time, in the order shown, restarting
the computer each time:
a. (Trained service technician only) Power switch/LED assembly
b. (Trained service technician only) System board
1. Make sure that:
v The power cords are correctly connected to the computer and to a working
electrical outlet.
v The type of memory that is installed is correct.
2. If you just installed an optional device, remove it, and restart the computer. If
the computer now starts, you might have installed more devices than the power
supply supports.
3. Override the front panel power control button:
a. Disconnect the computer power cords.
b. Reconnect the power cords.
4. See "Solving undetermined problems" on page 63.
5. (Trained service technician only) If the computer does not start, replace the
system board.
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 computer by pressing the power-control button for 4 seconds.
c. If computer fails POST and the power-control button does not work,
disconnect the ac power cord.
2. If the problem remains or if you are using an ACPI-aware operating system, the
problem could be with the system board.