IBM eServer BladeCenter HS20Type 8832, Installation And User Manual, Page: 79 / 112

Service processor 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 a problem remains, call for service.
Light path diagnostics feature overview
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 the light path diagnostics
This section provides the information about using the light path diagnostics to
diagnose problems that might arise during installation. To locate the actual
component that caused the error, you must 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.
2. Place the blade server on a flat, static-protective surface.
3. Remove the cover from the blade server.
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 “System-board LED locations” on page 12 for the location of the light path
diagnostics button and error LEDs, then see the “Light path diagnostics table” on
page 66.
Chapter 6. Solving problems
65