So my current in-sink-erator has stopped working. Flip the switch and it makes a quiet hum, but no turning. I stuck my hand down there (when it's off, of course) and was able to turn the plate the ...

Disconnect the power. In most cases, there’s an outlet under the sink that the disposal is plugged into. If you have a hardwired disposal, turn off the breaker that controls it. Turn off the water ...