IBM 6648 User Guide - Page 85

Power-on self-test (POST), Diagnostic error codes and messages, Configuration/Setup Utility program

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Page 85 highlights

No - Have the computer serviced. Yes - Do one of the following: v If the failure occurred immediately after you installed or removed an option, and you have not yet updated the configuration, see "Chapter 4. Using the Configuration/Setup Utility program" on page 29. v If the computer was functioning correctly after you installed an option and is now malfunctioning, have the computer serviced. v If the failure occurred immediately after you made a change to the configuration, verify that you selected the correct settings. v If the failure occurred immediately after you installed or removed a new option and you get an error message from the Configuration/Setup Utility program, disconnect the new device. Power-on self-test (POST) Each time you turn on your computer, it performs a series of tests that check the basic operation of the base computer. This series of tests is called the power-on self-test (POST). POST does the following: v Checks basic system board operations v Checks the memory operation v Compares the current system configuration with that established by the Configuration/Setup Utility program v Starts the video operation v Verifies that the diskette drives are working v Verifies that the hard disk drive and the CD-ROM drive are working POST error messages appear when POST finds problems with or changes to the hardware during startup. POST error messages are 3-, 4-, 5-, 8-, or 12-character alphanumeric messages and include brief explanations (except I999XXXX errors). Diagnostic error codes and messages Diagnostic codes and messages appear if a hardware problem is detected by one of the IBM Enhanced Diagnostics test programs or if POST detects a problem. Along with error codes, the messages present text information that can be used to identify a failing part. Chapter 6. Troubleshooting 71

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No - Have the computer serviced.
Yes - Do one of the following:
v
If the failure occurred immediately after you installed or removed an
option, and you have not yet updated the configuration, see “Chapter 4.
Using the Configuration/Setup Utility program” on page 29.
v
If the computer was functioning correctly after you installed an option
and is now malfunctioning, have the computer serviced.
v
If the failure occurred immediately after you made a change to the
configuration, verify that you selected the correct settings.
v
If the failure occurred immediately after you installed or removed a new
option and you get an error message from the Configuration/Setup
Utility program, disconnect the new device.
Power-on self-test (POST)
Each time you turn on your computer, it performs a series of tests that check
the basic operation of the base computer. This series of tests is called the
power-on self-test (POST)
.
POST does the following:
v
Checks basic system board operations
v
Checks the memory operation
v
Compares the current system configuration with that established by the
Configuration/Setup Utility program
v
Starts the video operation
v
Verifies that the diskette drives are working
v
Verifies that the hard disk drive and the CD-ROM drive are working
POST error messages appear when POST finds problems with or changes to
the hardware during startup. POST error messages are 3-, 4-, 5-, 8-, or
12-character alphanumeric messages and include brief explanations (except
I999XXXX errors).
Diagnostic error codes and messages
Diagnostic codes and messages appear if a hardware problem is detected by
one of the IBM Enhanced Diagnostics test programs or if POST detects a
problem. Along with error codes, the messages present text information that
can be used to identify a failing part.
Chapter 6. Troubleshooting
71