IBM 5150 Hardware Maintenance Manual page 65

Press
g
and
~
Enter. This
will
cause the System Unit
to check the IBM Monochrome Display and Parallel Printer
Adapter. An error message similar to one below may appear.
0:01:00
ERROR·MONOCHROME & PRINTER AOAPTER TEST 432
4· PRINTER AOAPTER TEST
PRESS ENTER TO CONTINUE
DID YOU COMPLETE THE TEST WITHOUT AN ERROR
MESSAGE?
NO
Replace your IBM Monochrome Display and Parallel
Printer Adapter. See Section 3, "Removal/
Replacement." ,,-....,
YES
400-12