Adjust Garage Door Opener

adjust garage door opener
garage door not working, no green light on the back. There is power in unity. Unit stopped.

I replaced the gearbox and at the same time trying adapted after reinstalling the unit I ran into some trouble closing. door after the reverse completely closed. I thought was on the track with the training set when the unit stopped working. There is no flashing green light on the back of this detainee. The light does not illuminate. I have power to the unit and security of the door seem to be drawn up in good shape. Any ideas?

It sounds like you enabled the limits of the trips down a bit, while for replacing the gear - that is what caused the door to start hitting the floor and goes straight up. This is quite common when people replace the gears without realizing that the chain has to be placed back on the gear up exactly where he was when he was taken or the limits will be incorrect. No biggie though - just have to adjust the limits until the door stops in the correct position and the positions down. Now if any of the lights of the unit is working (bulb, security sensors and the light next to the "learn" button on the back) sounds like the Board and become damaged. The safe way to test this is to press Learning button on the back of the unit once you plug it in. The light turns on when you press the button - otherwise, the logic board is more likely finish. This is also fairly common. The Board could have made contact with something while you were working with other adjustments that caused short out. I hope this helps!