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7321 N/B Maintenance
7321 N/B Maintenance
Each time the computer is turned on, the system BIOS runs a series of internal checks on the
hardware. This power-on self test (POST) allows the computer to detect problems as early as
the power-on stage. Error messages of post can alert you to the problems of your computer.
If an error is detected during these tests, you will see an error message displayed on the screen.
If the error occurs before the display is initialized,then the screen cannot display the error
message. Error codes or system beeps are used to identify a post error that occurs when the
screen is not available.
The value for the diagnostic port (
378H
) is written at the beginning of the test. Therefore, if the
test failed, the user can determine where the problem occurred by reading the last value written
to port
378H
by the 378H port debug board plug at PIO PORT.
7. Maintenance Diagnostics
7.1 Introduction
Summary of Contents for MiNote 7321
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