Epson 10020 - Manual (Page 160)

If the list correctly describes your system, press Y and then
Enter. If a device is missing from this list, or if you wish to
change the list, press N and Enter.
Note
If your system uses an EGA or VGA with a color monitor,
your device list should include item 5, "Color graphics
adapter and CRT." If your system uses an EGA or VGA with
a monocrhome display, your device list should include
item 4, "Monochrome display adapter and CRT."
Once 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 re-select System
diagnostics.
Modifying the DEVICE LIST
If an installed device is missing from the DEVICE LIST, it is
important that you add it to the list and test it carefully. In
response to this prompt:
Is the DEVICE LIST correct (Y/N)?
press N followed by Enter. You then see a new menu:
Modify DEVICE LIST
1 - Add devices
2 - Delete devices
0 - Exit
Enter selection number:
Performing System Diagnostics D-3