IBM 5150 - Page 84

This test is used to verify the 640 x 200 color graphics. The
background is black,
the left box is gray, the middle box is
gray,
the right box and the characters are white.
Press and (Enter).
The following should appear tJI @
on your Display:
640X200 GRAPHICS
•
,I,
IS THE SCREEN CORRECT? (YIN) - ~-
IS THE GRAPHIC DISPLAY THE SAME AS YOU SEE
HERE?
NO Replace your Color/Graphics Monitor Adapter. See
Section 3, "Removal/Replacement."
YES
500-13