Last month there was a power failure at my house. In order to get the car out of the garage, I disconnected the metal bar that connects the garage door to the opener. I did that at the upper end of the bar, where it attaches to the chain drive gizmo. After the power came back on, I connected the bar again. I thought I did it the same as it was connected before. Now, when the electric opener pulls the door open, it does it in a smooth fashion. When it closes the door, however, it shakes in an odd way. I don't think it was doing that before. Can anybody tell me what the problem is? I am including some pictures. Also, there is a problem with the remote control. It used to work about 30 feet away. Now you have to get within about 10 feet. I suspected that the battery was low, but it still put out 9 volts. Is something going bad in the remote, or is it in the receiver? If it's the receiver, is there a way to repair it without buying a new motor?