IBM 7940, Руководство по диагностике и обслуживанию

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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 a problem by using the information in this chapter,
see Appendix A, “Getting help and technical assistance,” on page 125 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 86.
v Error LEDs
Use the error LEDs to diagnose system errors quickly. See “System board error
LEDs and the light path button” on page 98 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 IBM
Enhanced
Diagnostics CD that comes with the server. See “Diagnostic programs,
messages, and error codes” on page 101 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
you are prompted, for POST to run.
If POST detects a problem, one or more beeps might sound, or an error message
is displayed. See “POST beep codes” on page 67 and “POST error codes” on page
77 for more information.
POST beep codes
A beep code is a combination of short or long beeps or series of short beeps that
are separated by pauses. For example, a “1-2-3” beep code is one short beep, a
pause, two short beeps, a pause, and three short beeps. A beep code other than
one beep indicates that POST has detected a problem. To determine the meaning
of a beep code, see “Beep code descriptions” on page 68. If no beep code sounds,
see “No-beep symptoms” on page 75.
© Copyright IBM Corp. 2007
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