IBM 5150 Hardware Maintenance Manual page 127

If you didn't receive an error message, you would have
received a message similar to the one below. DO NOT PRESS
g
(YES) OR
~
(ENTER) A T TIIIS POINT!
-----------------------------------------~
PARAllEL PRINTER ADAPTER TEST
'~Fj~' ~
;''';:;,~" ..
""I"'"
TEST WITH WRAP PLUG (YIN)?
DO YOU WANT TO INSTALL THE WRAP PLUG?
NO
Press
19
and
~
(Enter). This action
will
return you to the diagnostic menu.
YES
900-2