8050D N/B Maintenance

7.Maintenance Diagnostics

7.1Introduction

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 detect d duri g 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 us d to identify a post error that occurs when the screen is not

available.

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The value for the diagnostic port is wr tten at the beginning of the test. Therefore, if the test failed, the user can

 

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determine where the problem occurred by read ng the last value written to the port by the debug card plug at MINI PCI slot.

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