Epson Equity Ie Q50188015-1 - Manual (Page 95)

Video Check
Use this option to check the operation of your video monitor and controller.
The test includes several checks that allow you to identify specific video
problems.
You select the individual checks from a menu that looks similar to the one
below (the menu varies according to the type of monitor installed):
Video RAM check
Attribute check
Character set check
4 character set check
graphics mode check
6 graphics mode check
7 graphics mode check
Monochrome/Color video check
Run all above checks
0 Exit
Enter selection number:
If you specified to run the video check multiple times, only the video RAM
check is performed.
If an error occurs during any of these tests, write down the error message, or
print it out, and then contact your Epson dealer. When you are finished
with the test, press 0 and Enter to return to the DEVICE LIST.
Video RAM check
To check your video RAM, press 1 and then Enter.
The computer checks the video RAM (display memory) used for
monochrome or color graphics by writing certain data to memory, then
reading it back and comparing it to the written data.
Performing System Diagnostics D-7