We have pushed the open button in garage and in the car and the garage door will not open. We did pull the rope and opened the door manually. There is a green light inside overhead box that blinks 6 times, stops then blinks again 6 times. We cannot find the manual. We have cleaned the sensors and the circuit breaker and power for lights all working fine. Please help! Thankshttps://www.askmehelpdesk.com/images/smilies/smile.gif