Power Problems - IBM BladeCenter JS21 Types 8844 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, Types 7988 and 8844," on page 137 to determine which components are
CRUs and which components are FRUs.
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Symptom
Power switch does not work
and reset button, if supported,
does work.
The blade server does not turn
on.
The blade server turns off for no
apparent reason
The blade server does not turn
off.
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BladeCenter JS21 Types 7988 and 8844: Problem Determination and Service Guide
Action
1. Reseat the control-panel connector.
2. Replace the bezel assembly.
3. Replace the system-board and chassis assembly.
1. Make sure that:
a. The power LED on the front of the BladeCenter unit is on.
b. The LEDs on all the BladeCenter power modules are on.
c. The blade server is in a blade bay that is supported by the power modules
installed in the BladeCenter unit.
d. The power-on LED on the blade server control panel is blinking slowly.
v If the power LED is flashing rapidly and continues to do so, the blade
server is not communicating with the management module; reseat the
blade server and go to step 3
v If the power LED is off, the blade bay is not receiving power, the blade
server is defective, or the LED information panel is loose or defective.
e. Local power control for the blade server is enabled (use the BladeCenter
management module Web interface to verify), or the blade server was
instructed through the management module Web interface to start.
2. If you just installed a device in the blade server, remove it, and restart the
blade server. If the blade server now starts, you might have installed more
devices than the power to that blade bay supports.
3. Try another blade server in the blade bay; if it works, replace the faulty blade
server.
4. See "Solving undetermined problems" on page 135.
1. Make sure that each blade bay has a blade server, expansion unit, or blade
filler correctly installed. If these components are missing or incorrectly installed,
an over-temperature condition might result in shutdown.
2. If a microprocessor error LED is lit, replace the system-board and chassis
assembly.
1. Verify whether you are using an ACPI or non-ACPI operating system. If you are
using a non-ACPI operating system:
a. Press Ctrl+Alt+Delete.
b. Turn off the system by holding the power-control button for 4 seconds.
c. If the blade server fails during POST and the power-control button does not
work, remove the blade server from the bay and reseat it.
2. If the problem remains or if you are using an ACPI-aware operating system,
suspect the system-board and chassis assembly.