IBM eServer BladeCenter 8677, Installation And User Manual

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Light Path Diagnostics feature overview
On the BladeCenter system, the Light Path Diagnostics feature consists of the
LEDs on the front and rear of the BladeCenter chassis and on the front of the
modules and blade servers. 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 components also might be on. These LEDs help identify the cause of
the problem.
Identifying problems using the Light Path Diagnostics
This section provides the information to identify, using the Light Path Diagnostics,
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.
For example:
A system error has occurred and you have noted that the BladeCenter system-error
LED is lit on the system LED panel. You then locate the module or blade server that
also has an error LED lit (see “BladeCenter components, controls, and LEDs” on
page 31 for the location of error LEDs; see the documentation that comes with your
blade server for the location of error LEDs on the blade server). If the component is
a module, replace the module. If the component is a blade server with its system
error LED lit, follow the instructions in the documentation that comes with the blade
server to isolate and correct the problem.
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BladeCenter Type 8677: Installation and User’s Guide