I have a Kenmore garbage disposal, model 175-606140, that jammed. I turned on the switch and it moaned as if it would be jammed then I heard a snap like possibly a breaker in the unit may have tripped. Noew it does nothing when the switch is turned on. I cheched the reset on the bottom of the unit and the GFI associated with the unit but it is still dead. Can anyone offer some advice to direct me to the next step of trouble shooting this thing.