IBM Personal Computer AT Manual To Operations page 262

Example 4
Screen Response
Audio Response Action
See below
+
2 short beeps
=)
Any error
followed by
(RESUME=
"F1 "KEY)
Did you get a 16X, or a 201 error?
YES Go to "Setup" in this section.
NO Press Fl and go to "Diskette Format
Procedures" in this section. If
you pressed Fl
and nothing happened, have your keyboard and
system unit serviced. Be sure your Key Lock
key is with your system unit.
2-18 Error Examples