I have gone to a few of these where the symptom would be the door locks and nothing else would happen just dead, think the model AWZ 410 etc approx 2 year old. Wires on the pressure switch at the spade connectors can break causing the problem. Another problem i went to today with the same symptom was a faulty door lock. It would work if you put a screwdriver in to activate the door lock but not with the door pecker. It needed to go further than the pecker would allow due to faulty interlock.