320x200 graphics mode check

To check your 320x200 graphics mode, press 5 and then Enter.

The screen displays three colored squares-light green, brown, and red-against a cyan background. These four colors are Color Set 0. If they are correct, press Y and then Enter.

The same pattern displays again; this time the squares are cyan, white, and magenta, and the background is red. These colors are called Color Set 1. If these are also correct, press Y and then Enter to end the test.

If any colors display incorrectly, first check the adjustment of your moni- tor, and 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.

640x200 graphics mode check

To check your 640x200 graphics mode, press 6 and followed by Enter.

The screen displays three patterned squares against a black background, as shown below.

If the patterns on your screen are clear and distinct, press Y and then

If any pattern is not clear, 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.

4-14

Diagnostics