I detached the the door arm from the carriage to see if the opener would work properly, but it did not. The carriage goes down a half an inch and then goes all the way back up. I also adjusted the safety reverse to all possible configurations and that made no difference.
The opener is a Genie Screw Drive – Series G
Best Answer
The sensors (the "eyes" that are on both sides of the door opening) are probably "out of whack". If the sensors are not aligned properly, the doors won't operate. They could of been kicked by accident.