Below you will see all the control boards that you might find in your ice machine. Typically a one beeping alarm occurs when either the water was interrupted to the machine or hot water migration has crossed over into the cold water supply.
Resetting your machine will get your ice machine up and making ice again.
Steps on Resetting your ice machine:
After removing the front panel:
Track down where the alarm sound is coming from. Normally there is an access panel that needs removed by unscrewing 2-3 screws