Epson Y16499100301 - Manual (Page 101)

Appendix C
Power-on Diagnostics
The built-in memory (ROM) of your computer contains a
series of diagnostics 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 computer performs the
tests described in this appendix. 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 is displayed:
101
-System board error
Power-on Diagnostics
C-1