As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
Garage door intermittenly working.
If the remote works only when held within a few feet of the motor unit rf interference is probably the problem.
This may sound obvious but your garage door transmitters need power to work.
When the garage door opener works intermittently the logic board may be experiencing radio frequency rf interference from nearby sources such as security lights ham radios and some electronics.
Locate and eliminate the source of the rf interference.
First check the sensor lights.
If your garage door opener uses a keypad and that keypad stops working then there are a few things you can do to get it functioning again.
If the batteries in your transmitter are dead the transmitter won t be able to send a signal to your garage door to open.
The solutions firstly check that you re using it within the range required for your opener.
Clutter or obstructions that block the sensor are the first problems to look for if your door won t close or in extreme cases open at all.