IBM 5150 Hardware Maintenance Manual page 27

Your Advanced Diagnostics should be loaded from either
cassette or diskette.
The IBM Personal Computer DIAGNOSTICS
Version 1.00 (C) Copyright I BM Corp 1981
SELECT AN OPTION
0- RUN DIAGNOSTIC ROUTINES
1 - FORMAT DISKETTE
Z - COpy DISKETTE
9 - EXIT TO SYSTEM DISKETTE
INSERT DIAGNOSTIC DISKETTE IN DRIVE
A AND ENTER THE ACTION DESIRED
, I ,
-~-
DID THE ABOVE MESSAGE APPEAR ON YOUR DISPLAY
WITHOUT AN ERROR CODE?
NO
Refer to pages 010-6 and 010-7 for the error
indication codes.
YES
010-10