Garage door opener issue.
I have a two car garage door. My chain broke on a 2 year old 1/2hp craftsman garage door opener. I have fixed the chain and tried to run it. The chain does not move. The gears on the inside of the opener are fine. When the chain is not on the gear, it moves. Also I have the release off so that the garage door should open. Even when I release the garage door the chain still does not move. Currently the chain is in the correct position. When I try running, the opener wants to move the chain but it does not. This includes when the door is released from the guide.