If you do not have a light pen attached, press N and Enter. To 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 test. After three successful tests, the check ends.

An error occurs if one of the following is true:

•The light pen is not connected properly

•The light pen is malfunctioning

•You do not touch the square within 12 seconds.

Color Video Check

This test 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

9 -

Gray

2 -

Blue

10

-

Light blue

3 -

Green

11 -

Light green

4 -

Cyan

12

-

Light cyan

5 -

Red

13

-

Light red

6 -

Magenta

14

-

Light magenta

7 -

Brown

15

-

Yellow

8 -

White

16 -

White (high intensity)

To start this test, press 9 and Enter. Press any key to display each 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 incorrect, first check the adjustment of your monitor, and then 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.

C-18 Performing System Diagnostics