As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
How to fix a garage door opener.
The keypad doesn t work firstly check that you re using it within the range required for your opener.
If pressing the button on your garage door s remote control doesn t work check the batteries first.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.
You may also need to reprogram your keypad or replace the batteries in it.
Over tightening the chain will put excess wear and tear on the shaft and gears.
Simple but true the remote transmitter needs power to send a signal to your opener.
Garage door won t open all the way.
Also verify the antenna on the motor unit is in the proper placement.
Most chain drive openers suggest you tighten the chain so there s about 1 4 in.
Finally it s possible the garage door opener s motor.
Of slack from the rail to the chain check your manual.