IBM 6643 User Guide - Page 67

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

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• If the failure occurred immediately after you made a change to the configuration, verify that you selected the correct settings. Power-on self-test (POST) Each time you turn on your computer, it automatically 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: • Checks basic system board operations • Checks the memory operation • Compares the current system configuration with that established by the Configuration/Setup Utility program • Starts the video operation • Verifies that the diskette drives are working • Verifies that the hard disk drive and the CD-ROM or DVD-ROM drive are working POST error codes are displayed when POST detects problems with or changes to the hardware configuration during startup. POST error messages are 3-, 4-, 5-, 8-, or 12-character alphanumeric messages and include brief explanations. POST error codes The computer might display more than one error message. Often, the first error to occur causes subsequent errors. When using the POST message charts in this section, always begin by following the suggested action for the first error message that is displayed. Note that, in these tables, x can be any alphanumeric character. Code 101 102 106 114 129 131 135 151 Description Interrupt failure Timer failure System board failure External ROM checksum error Level 1 cache error POST detected a system board voltage out of range Microprocessor fan failure Real time clock failure Action Have the computer serviced. Have the computer serviced. Have the computer serviced. Have the computer serviced. Have the computer serviced. Have the computer serviced. Have the computer serviced. Have the computer serviced. Chapter 6. Troubleshooting 53

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Chapter 6.
Troubleshooting
53
•
If the failure occurred immediately after you made a change to the
configuration, verify that you selected the correct settings.
Power-on self-test (POST)
Each time you turn on your computer, it automatically 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:
•
Checks basic system board operations
•
Checks the memory operation
•
Compares the current system configuration with that established by the
Configuration/Setup Utility program
•
Starts the video operation
•
Verifies that the diskette drives are working
•
Verifies that the hard disk drive and the CD-ROM or DVD-ROM drive are
working
POST error codes are displayed when POST detects problems with or changes to
the hardware configuration during startup. POST error messages are 3-, 4-, 5-, 8-,
or 12-character alphanumeric messages and include brief explanations.
POST error codes
The computer might display more than one error message. Often, the first error to
occur causes subsequent errors. When using the POST message charts in this
section, always begin by following the suggested action for the first error message
that is displayed. Note that, in these tables,
x
can be any alphanumeric character.
Code
Description
Action
101
Interrupt failure
Have the computer serviced.
102
Timer failure
Have the computer serviced.
106
System board failure
Have the computer serviced.
114
External ROM checksum error
Have the computer serviced.
129
Level 1 cache error
Have the computer serviced.
131
POST detected a system board
voltage out of range
Have the computer serviced.
135
Microprocessor fan failure
Have the computer serviced.
151
Real time clock failure
Have the computer serviced.