Open the cabinet below the sink and ensure that the garbage disposal power cord has not been unplugged. If the garbage disposal is plugged in, check the fuse box to ensure that the fuse is not blown.
Unplug the disposal and turn off the water. Insert a hex wrench into the hex slot on the bottom of the underside of the garbage disposal. Turn the hex wrench back and forth to free any food that may be stuck under the disposal blades. Continue working the wrench back and forth until the disposal is able to turn at least one full rotation.
Remove any remaining objects in the garbage disposal using tongs.
Plug the disposal back into the wall, then press the red "Reset" button located on the bottom of the disposal to return the disposal back to normal operation.