IBM BladeCenter HS20, Installation And User Manual

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Service processor (BMC) problems
Symptom Suggested action
The service processor reports
a general monitor failure.
Shut down the operating system and turn off the blade server; then, remove the
blade server from the BladeCenter unit, wait for 30 seconds, reinstall the blade server
in the BladeCenter unit, and restart the blade server.
If the problem remains, call for service.
Light path diagnostics
If the system-error LED on the system LED panel on the front or rear of the
BladeCenter unit is lit, one or more error LEDs on the BladeCenter unit components
also might be lit. These LEDs help identify the cause of the problem.
Diagnosing problems using light path diagnostics
This section provides information about using the light path diagnostics to diagnose
problems that might occur during installation. To locate the actual component that
caused the error, locate the lit error LED on that component.
The following steps illustrate how to use the light path diagnostics to diagnose a
system error:
1. Shut down the operating system, turn off the blade server, and remove the
blade server from the BladeCenter unit (see “Turning off the blade server” on
page 14 and “Removing the blade server from the BladeCenter unit” on page
22).
2. Place the blade server on a flat, static-protective surface.
3. Remove the cover from the blade server (see “Opening the blade server cover”
on page 23).
4. Press and hold the light path diagnostics button to relight the LEDs that were lit
before you removed the blade server from the BladeCenter unit. The LEDs will
remain lit for as long as you press the button, to a maximum of 25 seconds.
See “Understanding the control panel and LEDs” on page 14 for more information
about the control panel buttons and error LEDs. See Table 7 on page 61 for
diagnostic LED descriptions.
Chapter 6. Solving problems
59