Since the lack of power supply is a common problem check the wires around the sensor when the led lights are not flashing.
Garage door electric eye not working.
If your garage door has been in place long enough enough dirt may have formed on the lenses to block the beam or cobwebs might be in the way.
If you ve checked the sensor eyes and alignment and the door still won t work properly the open and close limits could be to blame.
Evaluate the problem you are having with the garage door.
Either the beam is broken by the problem and the garage door won t close at all or the beam isn t properly detecting obstructions and it will close on anything unlucky enough to be in the door s way.
If it isn t it could get in the way of the electronic beam and prevent the garage door from closing because the cardboard tube is breaking the beam.
Put a tube on the electric eye on each side of the garage door one side for mornings the other side for evenings 5 make sure the tube is extending straight out from the electric eye.
Turn off the power to your sensors by tripping the fuse for your garage.
Many times the malfunction can be due to a loose connection or broken wire.
Look for obstructions adjust the sensors to get a solid green light.
So reconnect them to the opener and check their alignment.
These settings also referred to as travel limits tell the opener.
Also how to manually close and disconnect.
If your garage door is not working correctly it may be an indication that the photo eye requires adjustment.
If the garage door goes up.
You ll find this in your home s breaker box.
When this happens the green light on the receiving.
You won t actually be working with the electrical wiring but it s always best to be safe when working with electricity.
Sweep the garage floors and look through the sidings to ensure that there are no objects to obstruct the door.
But they are also required to be connected to the opener and adjusted properly or the garage door opener will not function.