Epson LT-286 - Manual (Page 145)

If you try to perform a speed test without inserting a diskette, or if a
read error occurs, you see this message and prompt:
Disk is defective or not installed
properly. Press ENTER to return to the
menu.
Disk Change Check
This test checks the ability of the diskette drive to detect that a
diskette has been removed or inserted.
Note
Disk changes cannot be detected by 360KB 5 1/4-inch drives.
Select option 5 from the menu to start this test. You see the
following message:
DISK CHANGE CHECK
Remove the disk from drive A.
As soon as you remove the diskette, you see the following message:
Re-insert the disk into drive A.
Re-insert the diskette. If no errors occur, the menu reappears. An
error occurs if the drive is malfunctioning or if you do not remove
or replace the diskette within a certain time.
Run All Above Checks
To run all the tests on the menu in sequence, press 6 and Enter.
When you choose this option, all checks for the diskette drive(s)
and controller are performed automatically in sequential order.
Although you do not start each test, you must still supply the
appropriate responses to progress from one test to the next.
D-20 Performing System
Diagnostics