Epson Apex 20020 - Manual (Page 166)

To start the system diagnostics program, follow these steps:
1. Insert the Reference diskette in drive A.
2. Turn on or reset the computer. The OPERATION MENU
appears.
3. Press 4 reset System diagnostics and then
press Enter.
When you start the system diagnostics, the computer checks
the following:
The positions of the internal jumpers
Any peripheral devices that are connected to the system.
After these items are checked, you see a list of the devices
available for testing. This list includes only the devices that are
installed in your system and looks something like this:
The following devices have been installed
DEVICE LIST
1 - System board
2 - Memory
3 - Keyboard
5 - Color graphics adapter and CRT
6 - Floppy disk drives and controller
9 - Parallel port (printer interface)
11 - Serial port (RS-232C port)
14 - Dot-matrix printer
17 - Hard disk drives and controller
81 - Parallel port (on video adapter)
Is the DEVICE LIST correct (Y/N)?
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.