Epson 3865X Plus User Manual page 300

The table below lists the tests you can run on the system's
internal devices and on any optional devices you have installed.
You may not see all of the tests listed when you run System
diagnostics. Some tests appear only if you have installed certain
types of equipment. The program displays the title of each
check on the screen.
Tests that check the operation of parallel or serial ports require
you to use a special connector in order to test the device.
Contact your dealer to obtain the connector listed in the table
below before beginning the tests.
For a complete list of the error codes and messages these tests
may display, see the table at the end of this appendix.
System diagnostics tests
Device
System board
Memory
Keyboard
Monochrome
display adapter
and CRT
Tests available
Adapter check
Attribute check
Character set check
Graphics mode check
Screen paging check
Video check
Sync check
Run all above checks
Performing System Diagnostics
Description
Checks the
80386SX
microprocessor
Checks all
memory and
displays a
memory count
Tests all keys on
the keyboard
Tests all types of
monochrome
monitors
E-9