IBM Personal Computer XT Manual To Operations page 168

16
Your printer also is controlled by program
commands from the system unit. If you still
have a printer problem, or if the problem occurs
only during a particular program, examine the
program thoroughly for commands that might
cause the printer to produce undesired results.
~
If you complete the printer self-test and have no
apparent program problems, have the unit to
which the printer is attached serviced.
8000-8 Test
April 1984