Epson 20 Manuel D’Utilisation

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.

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.

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.

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

C-13