There are 3 ways to cancel the alarm 24-Hour Alarm Reset * Press Power. * 24-Hour Alarm Reset means the alarm will be stopped immediately but will retain the same alarm setting for the following day. Repeat Alarm * When the alarm goes off, press Repeat Alarm/Brightness Control. * Repeat Alarm will repeat the alarm at 9-minute intervals. Cancel the Alarm Completely * Press the ALM 1 or ALM 2 button once or more until ALM1 or ALM2 disappears.