Open the garage door.
Garage door repair sensors.
Raise the garage door using the control button on the garage wall or the remote control unit from a vehicle.
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Attempt to close the garage door using a remote.
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If the garage door opener closes the door with the safety sensors blocked replace the logic board.
The door should stay open and the motor unit lights should blink.
Inspect each sensor to make sure the green or red power indicator lights are.