I bought a new Genie screw drive garage door opener last summer and installed it with my friend's help. It was working fine until a few days back it would come all the way down until the LED sensors and then would go back up. When the door reaches the LED level, the LEDs would blick a few times and then the door would go back up. I have tried adjusting the limit switch positions and the "open" and "close" screw on the panel head. I have also checked the levels of the LED alingment and also cleaned the LED lens with no luck. One thing I notice is that when the door is closing and if I try to hold the door manually with my hand to check the pressure, the door does not stop. It goes all the way until the LED level and then goes back up. I have also checked the wiring for the LED. Any idea where the problem is???