Craftsman 1/2 HP Garage Door Opener
I have a Craftsman 1/2 HP GDO. It has worked fine until a couple of days ago. I tried to open the door, it went up about 3 inches & stopped. The motor didn't grind, hum, tick or anything else. I checked the breaker, the plug, the wires, etc and everything seems to be in proper order.
Is there some sort of internal fuse/circuit breaker that might have flipped? Or any other suggestions?