640x200 Graphics Mode Check
To check your 640x200 graphics mode, select 6. The screen displays three patterned squares against a contrasting background, as shown below.
640X200 GRAPHICS MODE CHECK
Is the display correct ? (Y/N)
If the patterns on your screen are clear and distinct, select Y. 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, select N to display the error message.
Performing System Diagnostics |