IBM 5155 Manual To Operations page 175

16
Leave the printer cable disconnected from the
printer and run the system diagnostic tests again.
Verify that the list of installed devices and
options is correct. (your printer
will
be missing
from the list).
17
Did you receive the same error message when
you ran the system diagnostic tests this time?
YES -
If
your printer is attached to an adapter
in your system unit, have the system unit
serviced.
If
your printer is attached to
an adapter in the expansion unit, have
the expansion unit serviced.
NO - Have the printer and its cable serviced.
18
Your printer also is controlled by program
commands from the system unit.
If
you are still
having a printer problem, or if you have a printer
problem only during a particular program,
examine the program thoroughly for commands
that might cause the printer to produce
undesired results. If you have completed the
printer self -test and have no apparent program
problems, have the unit that the printer is
attached to serviced.
January 1984
Test 8020-7