Options Problems; Light Path Diagnostics Feature; Identifying Problems Using The Light Path Diagnostics Feature - IBM BladeCenter T 8720 Installation And User Manual

Options problems

Device
An IBM option that was just
installed does not work.
An IBM option that used to
work does not work now.

Light path diagnostics feature

On the BladeCenter T system, the light path diagnostics feature consists of the
LEDs on the front and rear of the BladeCenter T unit and on the front of the
modules and blade servers. If a system-alarm LED on the system-status panels on
the BladeCenter T unit is lit, one or more error LEDs on the BladeCenter T
components also might be on. These LEDs help identify the cause of the problem.

Identifying problems using the light path diagnostics feature

This section provides the information to identify, using the light path diagnostics
feature, 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 example illustrates how to use the light path diagnostics feature to
diagnose a system error:
1. Note that a BladeCenter T system-error LED is lit on the system-status panel.
2. Locate the module or blade server that also has an error LED lit (see Chapter 4,
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BladeCenter T Types 8720 and 8730: Installation and User's Guide
Suggested action
Make sure that:
v The option is designed for the BladeCenter T unit. See the "Server Support"
flowchart on the inside of the front cover for information about obtaining
®
ServerProven compatibility information from the World Wide Web.
v You followed the installation instructions that come with the option.
v The option is installed correctly.
v You have not loosened any other installed options or cables.
If the problem remains, call for service.
v Make sure that all of the option hardware and cable connections are secure.
v If the option comes with test instructions, use those instructions to test the option.
If the problem remains, call for service.
"BladeCenter T components, controls, and LEDs," on page 51 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).
a. If the component is a module, replace the module.
b. 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.