Epson 10020 - Manual (Page 178)

Color Video Check
Option 9, Color video check, displays 16 different screens,
each a different color, and a message indicating the color. The
screens show the following colors in the order specified below:
1 - Black
2 - Blue
3 - Green
4 - C y a n
5 - Red
6 - Magenta
7 - Brown
8 - White
9 - Gray
10 - Light blue
11 - Light green
12 - Light cyan
13 - Light red
14 - Light magenta
15 - Yellow
16 - White (high intensity)
To start this test, select option 9 from the menu; the first screen
appears. Press any key to display the next screen. On the last
screen, you see this prompt:
Is the display correct (Y/N)?
If all the colors are correct, press Y and Enter to end the test.
If any color is displayed incorrectly, check the adjustment of
your monitor and make sure that both ends of the cable are
plugged in firmly. If a problem still exists, press N and Enter to
display the error message.
Sync Check
This test is provided for service purposes only. If you
accidentally select this option, press any key to end the test.
Run All Above Checks
To run all the tests on the menu in sequence, press 11 and
Enter. When you choose this option, all checks for the color
adapter and CRT 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.
Performing System Diagnostics D-21