IBM Personal Computer Manual To Operations page 79

Example 1
Screen Response Audio Response
Action
Have the
keyboard
XX 301
2 short beeps
serviced
(X
can be any
character)
Note: Ensure the keyboard is connected correctly
and check for any objects or foreign material on the
keyboard.
If
error 301 still appears after the
keyboard has been serviced, have the system unit
serviced.
Example 2
Screen Response
Audio Response Action
~1II1111111111~1
Goto
"Diagnostic
Any error
2 short beeps
Testing"
except XX301
(X can be any
character)
April 1984
Start 30-5