If a 24 hour visible point is in trouble, the keypad will buzz a constant tone until command 4 is pressed at the keypad.
If pressing command 4 at the keypad does not stop the buzzing from the keypad, ensure no keys on the keypad are stuck in the pressed position.
Repair any stuck keys by removing the faceplate and correct the stuck key. Take care to not allow any keys to become stuck when replacing the keypad faceplate.
After correcting the stuck key, press command 4 to silence the trouble tone.
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