Epson 10020 User Manual

If all eight pages are correct, press Y and 

Enter. 

If 

any page is

filled with an incorrect number, press N and Enter co display

the error message.

To check the function of a light pen connected to the color

graphics adapter card, press 

8 

and then 

Enter. 

This test checks

that a light pen connected to the color graphics adapter is
performing accurately. When you select this check, you see

these prompts:

Enter Y to start light pen check.

Enter N to return to the menu.

If you do not have a light pen attached, 

press N 

and 

Enter. 

T o

begin the test, press Y and 

Enter. You see this 

prompt:

PLACE LIGHT PEN ON CENTER OF WHITE BLOCK

Touch the center of the white block on the screen with the

light pen. When the light pen is correctly positioned, the block
moves to another part of the screen for a second teat. After
three successful tests, the check ends.

An error occurs if:

The light pen is not connected properly

   You touch the screen at the wrong point

The light pen is malfunctioning

You do not touch the square within a certain amount of
time (which is dependent on the current CPU speed).

D-20

Performing System Diagnostics