Color graphics adapter check, Attribute check, Character set check – Epson 20 User Manual
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If an error occurs during any of these tests, record the error code and
message, or print them out. Then contact your Epson dealer or
service center.
Color Graphics Adapter Check
To check the color graphics adapter, press
1
and then
Enter.
The
computer checks the video RAM (display memory) on the display
adapter by writing test data to memory, and then reading it back and
comparing it to the written data. The computer also tests the video
enable signal of the display controller chip.
Attribute Check
To check the display attributes of the color graphics adapter card,
press 2 and
Enter.
Several messages appear showing examples of all
the possible display attributes and colors. Check the information on
your screen, and respond to the prompt:
Is the display correct (Y/N)?
Press Y and then
Enter
if the display is correct. If the colors are not
correct, adjust the controls on your monitor. If they are still incorrect,
press
N
and
Enter.
Contact your dealer to verify any monitor
problems.
Character Set Check
To check your 80-column character set, press 3 and
Enter.
The
character fonts that are included in the internal character generator
of the video adapter appear on your screen. Compare your screen
display to the following illustration.
Performing System Diagnostics
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