IBM 5150 Manual To Operations page 34

If you could not load your cassette, the most likely causes are:
1. Cassette recorder
2. Wrong or damaged cassette
3. Keyboard failure.
Contact your place of purchase if you cannot continue.
STALLED DEVICES ARE
RD
12
KEYB
MONOCH
BII
TER ADAPTER
COLORiGRAP ER
2 DISKETTE DRIVE
PTER
MATRIX PRINTER
..
~
IS THE LIST CORRECT (YiN).
Press
g
then
~
enter.
Go to Step 17.
Setup 2-18