Power Problems; Memory Problems - IBM eServer BladeCenter JS20 Type 8842 Installation And User Manual

Power problems

Power symptom
The blade server does not
turn on.

Memory problems

Memory symptom
The amount of system
memory displayed is less
than the amount of physical
memory installed.
Suggested action
1. Make sure that:
a. The power-on LED on the front of the BladeCenter unit is lit.
b. The LEDs on all the BladeCenter power modules are lit.
c. If the blade server is in blade bays 7 through 14, power modules are in
power-module bays 1, 2, 3, and 4.
d. The power-on LED on the blade-server control panel is flashing slowly.
v If the power-on 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, either 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 make sure), or the blade server was
instructed through the management module (Web interface) to turn on.
2. If you just installed an option in the blade server, remove it, and restart the blade
server. If the blade server now turns on, troubleshoot the option (see the
documentation that comes with the option for information).
3. Try another blade server in the blade bay; if it works, replace the faulty blade
server.
4. If the problem remains, have the blade server serviced.
Suggested action
Make sure that:
v The memory modules are seated correctly.
v You have installed the correct type of memory.
v All banks of memory on the DIMMs are enabled. The server might have
automatically disabled a DIMM bank when it detected a problem.
v The DIMMs are not defective. If a DIMM has failed, an 8-digit error code will be
displayed in the following format: "25C0xx yy".
To identify the specific DIMM that has failed, see "25C0xx yy" in Table 2 beginning
on page 75, and obtain the values for "xx " and "yy". Replace the failing DIMM;
then, restart the server.
v The blade-server firmware code automatically updated the memory configuration, if
you changed the memory.
If the problem remains, call for service.
Chapter 10. Solving problems
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