IBM 3270 - Page 138

Is your screen unreadable because of incorrect
characters?
Yes No
I
The problem is most likely the display.
You should confirm this by running this
test again with a display that you know
is working. If the problem does not
occur with the other display, your original
display has a problem; report a problem with
the display, or have it serviced to fix the
problem. If the problem persists, your
system unit has a problem; report a problem
with the system unit, or have it serviced.
(If
you do not have another working
display, report your display, or have it
it serviced.) •
The system unit has a problem. Report
the problem or have the unit serviced
to fix the problem. •
Chapter 5. Locating Problems with Your PC Units 5-23