I replaced the sprocket gear on my 1/2 HP Craftsman Garage Door Opener and it ran like new, but I did all runs using the wall-mount (hard-wire) switch. Last night my wife opened the door with her remote and now NOTHING happens! After waiting all night, I tried the wall-mount button and the door opened, but then AGAIN the sensor lights went dead and the opener again does not respond when using the remote OR the wall-mount switch. H E L P!