IBM X3950 X5 Problem Determination And Service Manual page 70

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, Types 7145, 7146, 7143, and 7191," on page 81 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
(continued)
The server does not turn off.
The server unexpectedly shuts
down, and the LEDs on the
operator information panel are
not lit.
54
IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
Action
1. Reseat the following components:
a. Memory card (see "Removing a memory card" on page 136 and
"Removing the memory-card cage" on page 175)
b. Operator information panel (see "Removing the operator information panel
assembly" on page 118 and "Replacing the operator information panel
assembly" on page 120)
c. (Trained service technician only) Microprocessor board (see "Removing the
microprocessor-board assembly" on page 171 and "Replacing the
microprocessor-board assembly" on page 173)
2. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Memory card
b. Operator information panel
c. (Trained service technician only) Microprocessor board
3. 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.
4. See "Power-supply LEDs" on page 69.
5. See "Solving undetermined problems" on page 77.
1. Determine whether you are using an Advanced Configuration and Power
Management (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 holding the power-control button for 5 seconds.
c. Restart the server.
d. If the server 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 server.
2. If the problem remains or if you are using an ACPI-aware operating system,
suspect the microprocessor board.
See "Solving undetermined problems" on page 77.