When your opener quit working was the door in the open position? Does the small LED blink 5 times then pause and repeat? It is located next to all those white wires. If so your trolley is probably jammed against the bolt just in front of the opener. Remove the bolt and run the door until it closes. Then using a small screwdriver turn the 'up limit' control about 4 turns in the opposite direction of the arrow printed on the cover. The 'up limit' is located on the side of the opener. Let us know.

I have a similar problem with a Craftsman garage door opener, model 139.53628SRT. There is power to the unit and the green lights on the safety sensors are on. When I press the wall unit or the remotes, I hear a click, followed by a second click a few seconds later. But, the motor doesn't run. When this first happened, the door was in the closed position. None of the lights on the unit blink when we press the wall unit buttons or the remote.

Thanks for your help!