IBM 9228 Service Guide - Page 105

Diagnostics, Diagnostic tools, POST, POST beep codes, Beep code descriptions

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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 computer. If you cannot locate and correct the problem using the information in this chapter, see Appendix A, "Getting help and technical assistance," on page 149 for more information. Diagnostic tools The following tools are available to help you diagnose and solve hardware-related problems: v POST beep codes and error messages 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 107 for more information. v Diagnostic programs, messages, and error codes The diagnostic programs are the primary method of testing the major components of the computer. The diagnostic programs are stored on a hidden partition on the hard disk. See "Diagnostic programs, messages, and error codes" on page 122 for more information. POST When you turn on the computer, it performs a series of tests to check the operation of computer components and some optional devices in the computer. 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 computer startup is completed. If POST detects a problem, more than one beep might sound, or an error message is displayed. See "Beep code descriptions" and "POST error codes" on page 94 for more information. POST beep codes A beep code is a combination of short and long beeps or a series of short beeps 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." If no beep code sounds, see "No-beep symptoms" on page 92. Beep code descriptions The following table describes the beep codes and suggested actions to correct the detected problems. © Copyright IBM Corp. 2007 87

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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 computer.
If you cannot locate and correct the problem using the information in this chapter,
see Appendix A, “Getting help and technical assistance,” on page 149 for more
information.
Diagnostic tools
The following tools are available to help you diagnose and solve hardware-related
problems:
v
POST beep codes and error messages
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 107 for more information.
v
Diagnostic programs, messages, and error codes
The diagnostic programs are the primary method of testing the major
components of the computer. The diagnostic programs are stored on a hidden
partition on the hard disk. See “Diagnostic programs, messages, and error
codes” on page 122 for more information.
POST
When you turn on the computer, it performs a series of tests to check the operation
of computer components and some optional devices in the computer. 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 computer startup is completed.
If POST detects a problem, more than one beep might sound, or an error message
is displayed. See “Beep code descriptions” and “POST error codes” on page 94 for
more information.
POST beep codes
A beep code is a combination of short and long beeps or a series of short beeps
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.” If no beep code sounds, see
“No-beep symptoms” on page 92.
Beep code descriptions
The following table describes the beep codes and suggested actions to correct the
detected problems.
© Copyright IBM Corp. 2007
87