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 one light red one green.
Red sensor lights are an issue because they should generally be green.
These sensors are little black boxes found on either side of the bottom of the garage door.
At that point a homeowner may want to try.
Many times the malfunction can be due to a loose connection or broken wire.
My genie garage door won t open.
Did pull screw level to see if that was an issue re engaged lever not sure if did it up or down and still same problem.
One sensor is red and one is green.
Inspect each sensor to make sure the green or red power indicator lights are.
If the red light is blinking the sensors are not aligned.
That there are no obstructions.
I put a new battery in the remote too.
Door starts down abruptly stops goes back up.
Genie garage door opener with the red green light for detecting something in way of door closing.
I ll do all i can to help.
I moved the red one and the red light stopped blinking but the door still won t open.
Replaced the door sensors and alignment appears to be fine as both green red lights are constant.
Raise the garage door using the control button on the garage wall or the remote control unit from a vehicle.
If just the red source led is out unplug the mechanism check the wiring and plug it back in.
One will have a green light used to show that the units are powered up and the other will have a red light to show that there s no obstruction between the sensors and that they re seeing each other.
One will have a green light that signifies power to the units and the other will have a red light that signifies that the sensors are seeing each other i e.
If both the red source and green sensor lights are on and not blinking then the door mechanism is working properly.
And when they re blinking they re flashing a warning to the homeowner that something needs to be corrected.
Re align them by moving one of them until the red light stays lighted.
If one or both of the lights are off check the fuses breakers and plugs for problems.
Each sensor will usually have a light.