Garbage Disposal problems can be plumbing, electrical or appliance. If the disposal doesn't work at all - no *hum* or any sound, then push the red (reset) button on the bottom of the disposal. If that doesn't work, check the breaker in the electrical panel. If the unit *hums* but doesn't turn then you can try unsticking it.. Some units come with a wrench that you can use to turn the cutter flywheel from the bottom. ( An allen wrench will work). Or, use a *plumber's friend* , broom handle- something with a handle, and stick it in the disposal and try to turn the cutting wheel around. In effect - unstick it. If the unit doesn't respond to the above, it's time for an appliance repair man or replace the unit.