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 mows to another part of the screen for a second test. 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 (depen- dent on the current CPU speed).

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:

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 is displayed. 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 arc iorvxt, press Y ad Enter to cd the test. If any color is displayed in~cwxxtly, 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.