Epson 386/25 - Manual (Page 279)

Appendix E
Performing System Diagnostics
This appendix describes how to check the operation of the main
unit and peripheral devices of your computer. You check these
devices using the diagnostics program on your Reference
diskette.
Run the diagnostics program if you are not sure whether a device
is performing correctly. The table at the end of this appendix
lists the error messages you may see during testing.
You can test the following devices, each of which is identified by
specific reference numbers:
1 - System board
2 - M e m o r y
3 - Keyboard
4 - Monochrome display adapter and CRT
5 - Color graphics adapter and CRT
6 - Diskette drives and controller
7 - Math coprocessor
9 - Parallel port (printer interface)
11 - Serial port (RS-232C port)
12 - Alternate serial port
14 - Dot-matrix printer
17 - Hard disk drives and controller
21 - Alternate parallel port
81 - Parallel port (on video adapter)
Performing System Diagnostics
E-1