IBM 3270 Maintenance Manual page 88

Perform the following steps in the sequence
listed and listen for the beep each time you press
Enter:
1.
Press 0, then Enter. One beep should be
heard after approximately 30 seconds.
2. Press Y, then Enter. One beep should be
heard after approximately one second.
3. Press 0, then Enter. One beep should be
heard after approximately one second.
4. Press 3, then 2, then Enter. One beep should
be heard after approximately 60 seconds.
DID YOU COMPLETE THE PREVIOUS
STEPS AND GET THE CORRECT AUDIO
RESPONSES?
YES Go to page 3-25-15.
NO
October 1984 3-25-13