Appendix B
Power-on Diagnostics
The built-in memory (ROM) of your computer contains a series of diag-
nostics programs. These programs are run automatically by the system every
time you turn on the power. The diagnostics programs check the internal
devices such as ROM, RAM, keyboard controller, timer, video controller,
and floppy disk driver.
When you turn on the power, the tests described in this appendix are
performed. If an error is found, a specific error number and error message are
displayed. If the error is serious, the computer cancels further checking and
halts system initialization. The error message remains on the screen but the
computer is inoperable.
If the error is not serious, the computer displays an error message and
waits for you to resume further checking. You see this prompt:
F1 key to resume
Write down the error message and code number, and then press
F1
to
resume. Report the error message and code number to your dealer when
requesting repairs.
System Device Check
The computer first checks its internal devices such as the ROM. If a
malfunction is found, the computer displays an error message. In some cases,
it may halt with no further information. If this happens, contact your dealer
as soon as possible.
If a fault in the main board is found, the computer stops and this error
message displays:
board error
Give this error number to your dealer.
If an I/O or checksum error occurs, you see this message:
ROM error
where xxxx is the number of the segment of the bad I/O ROM on an option
card.
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