IBM 3270 Maintenance Manual page 403

Your screen should look like the following.
Examine your screen and verify that the
highlighted portions are solid white and the
non-highlighted portions are solid black.
III II
1111111111111111111
1111111111111111111
1111111111111111111
11111111111111111111
1111111111111111111
I11111III111I111111
II1II1IIII11II111111
1111111111111111111
DOES YOUR SCREEN MATCH THE SCREEN
ABOVE?
NO Replace the all points addressable adapter.
YES
See Section 5, "Removal/Replacement and
Adjustments. "
Note: The diagnostic· detects errors in all
display memory. Replace the adapter only
if the error affects your applications.
3-3200-54 Maintenance Information