My Craftsman 139.53515SR - I/2HP garage door opener has worked fine for many years. For no reason that I can see, it stopped opening or closing the door yesterday. When I push the button to raise or lower it I hear some noise, like it's trying to work, then in a few seconds it stops and there has been no motion of the door or chain that raises and lowers it.
Disengaging the door from the chain allows me to raise and lower the door without problem.
It failed for 24 hours then started working.
Here is a video of it not working:(
What do you think is wrong?