Power Problems - IBM BladeCenter HS20 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, Type 7981 and 1884," on page 53 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
Power switch does not work,
and the reset button, does work.
The blade server does not turn
on.
The blade server does not start
and the following conditions are
present:
v The amber system-error LED
on the BladeCenter unit
system LED panel is lit.
v The amber blade error LED
on the blade server control
panel is lit.
v The management-module
event log contains the
message Processor speed
mismatch.
The blade server turns off for no
apparent reason.
Action
1. Reseat the control-panel connector.
2. Replace the bezel assembly.
3. (Trained service technician only) Replace the system board assembly.
1. Make sure that:
a. The power LED on the front of the BladeCenter unit is lit.
b. The LEDs on all the BladeCenter power modules are lit.
c. The BladeCenter unit has the correct power configuration to operate the
blade bay where your blade server is installed (see the documentation for
your BladeCenter unit).
d. The power-on LED on the blade server control panel is flashing 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 or IBM Director)
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 49.
Make sure that microprocessors 1 and 2 are identical (number of cores, cache size
and type, clock speed, internal and external clock frequencies).
(Trained service technician only) If microprocessors are not identical, remove the
microprocessor with the incorrect specifications and replace with a microprocessor
that has the correct specifications.
1. Make sure that each blade bay has a blade server, expansion unit, or filler
blade correctly installed. If these components are missing or incorrectly
installed, an over-temperature condition might result in shutdown.
2. (Trained service technician only) If the microprocessor error LED is lit, replace
the microprocessor.
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Chapter 2. Diagnostics