Epson LT-286 - Manual (Page 122)

Appendix C
Power-On Diagnostics
The built-in permanent memory in your computer (ROM)
contains a series of diagnostics programs. These programs are run
automatically by the system every time you turn on the power. The
diagnostics programs test the components of your system, such as
the ROM, RAM, keyboard controller, timer, video controller,
diskette driver, and hard disk controller.
When you turn on the power, the computer performs the tests
described in this appendix. If an error is found, an error code and an
error message are displayed. If the error is serious, the computer
cancels further checking and halts the system. The error message
remains on the screen, but the computer is inoperable. Write down
the error message and code number and call your Epson dealer.
If the error is not serious, the computer displays an error message
and waits for you to resume further checking. You see this prompt:
(Resume = "F1" key)
Write down the error message and code number, and then press F1
to resume. Report the error message and code number to your
dealer.
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, the computer may halt with no further information. If
this happens, contact your Epson dealer as soon as possible.
If the computer finds an error on the system board, this message is
displayed:
10x-system board error
where x is a number from 1 to 8 that represents the specific circuit
Power-On Diagnostics C-1