Hi, I'm hoping someone here has had a similar problem and can help. We purchased the Chickenguard Extreme model in May of this year and it has been working beautifully until this morning when it did not open. It has a low battery message on the display. Tried installing several packages of new AA alkaline batteries and same message. Tried removing and reattaching the cable that goes to the battery holder. Nothing. Does anyone know how to do a reset on the unit as I do not think the batteries are the problem?