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Diagnostics
This section provides basic troubleshooting information to help you resolve some
common problems that might occur with your server.
Diagnostic tools overview
The following tools are available to help you identify and resolve hardware-related
problems:
v POST beep codes, error messages, and error logs
v Light path diagnostics
v Diagnostic programs and error messages
POST
When you turn on the server, it performs a series of tests to check the operation of
server components and some of the options installed in the server. This series of
tests is called the power-on self-test or POST.
If POST finishes without detecting any problems, a single beep sounds, the first
screen of your operating system or application program appears, and the System
POST Complete (OK) light is illuminated on the operator information panel.
If POST detects a problem, more than one beep sounds and an error message
appears on your screen. See "Beep Symptoms" on page 125 and "POST error
codes" on page 134 for more information.
Notes:
1.
2. A single problem might cause several error messages. When this occurs, work
Event/error logs
The POST error log contains the three most recent error codes and messages that
the system generated during POST. The System Event/Error Log contains all error
© Copyright IBM Corp. 2000
The power-on self-test (POST) generates beep codes and messages to indicate
successful test completion or the detection of a problem. See "POST error codes"
on page 134 for more information.
Your server has light-emitting diodes (LEDs) to help you identify problems with
server components. These LEDs are part of the light-path diagnostics that are
built into your server. By following the path of lights, you can quickly identify
the type of system error that occurred. See "Light path diagnostics" on page 14
and the table in "Information panel system error LED" on page 128 for more
information.
The server diagnostic programs are stored in upgradable read-only memory
(ROM) on the system board. These programs are the primary method of testing
the major components of your server. See "Diagnostic programs and error
messages" on page 15 for more information.
If you have a power-on password or administrator password set, you must
type the password and press Enter, when prompted, before POST will continue.
to correct the cause of the first error message. After you correct the cause of the
first error message, the other error messages usually will not occur the next
time you run the test.
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Table of Contents
Troubleshooting
