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Chapter 5. Diagnostics
This chapter describes the diagnostic tools that are available to help you solve
problems that might occur in the server.
If you cannot locate and correct the problem using the information in this chapter,
see “Getting help and technical assistance” on page 217 for more information.
Diagnostic tools
The following tools are available to help you diagnose and solve hardware-related
problems:
v POST beep codes, error messages, and error logs
The power-on self-test (POST) generates beep codes and messages to indicate
successful test completion or the detection of a problem. See “POST” for more
information.
v Troubleshooting tables
These tables list problem symptoms and actions to correct the problems. See
“Troubleshooting tables” on page 172.
v Server LEDs
Use the LEDs on the server to diagnose system errors quickly. See “Error LEDs”
on page 186 for more information.
v Diagnostic programs, messages, and error messages
The diagnostic programs are the primary method of testing the major
components of the server. The diagnostic programs are on the Diagnostics CD
that comes with the server. See “Diagnostic programs, messages, and error
codes” on page 189 for more information.
POST
When you turn on the server, it performs a series of tests to check the operation of
the server components and some optional devices in the server. This series of tests
is called the power-on self-test, or POST.
If a power-on password is set, you must type the password and press Enter, when
prompted, for POST to run.
If POST is completed without detecting any problems, a single beep sounds, and
the server startup is completed.
If POST detects a problem, more than one beep might sound, or an error message
is displayed. See “POST beep codes” on page 148 and “POST error codes” on
page 155 for more information.
© Lenovo 2008. Portions © IBM Corp. 2008. 147