Epson 386/25 - Manual (Page 281)

If the list correctly describes your system, make sure Y is
highlighted and press Enter. If a device is missing from this list,
or if you want to change the list, press N or and Enter. Then
see “Modifying the Device List” on page E-5.
Note
If your system uses the built-in VGA adapter or an EGA or
VGA card with a color monitor, your device list should
include item 5, Color graphics adapter and CRT. If your
system uses the built-in VGA adapter or an EGA or VGA
card with a monochrome monitor, your device list should
include item 4, Monochrome display adapter and CRT.
After you confirm the Device List, you can test only those items.
If you decide later that you need to add a device, you must
return to the Operation Menu and reselect System
d i a g n o s t i c s .
Note
After you have installed MS-DOS, you should always boot
the computer from your hard disk or from the Startup diskette
to use MS-DOS. When you are finished running system
diagnostics, remove the Reference diskette from drive A.
If you do not have a hard disk, insert the Startup diskette.
Then reset your computer to make sure it performs all the
commands in the CONFIG.SYS and AUTOEXEC.BAT files.
Performing System Diagnostics E-3