There are quite a few things that could cause this to happen.
My garage door opener remote is not working.
However if all the garage door openers stop working at the same time then most likely the garage door antenna is not attached properly or the garage door opener itself needs to be reset.
First check the batteries within the remote itself to be sure they still carry a charge powerful enough to operate the remote.
The garage door opener remote only works up close.
A remote will not work if there is no power at the receiver.
Troubleshooting tips for when your garage door remote suddenly stops working and or the buttons are not responding.
The most common reason for a garage door remote transmitter to stop working is a dead battery.
Next release the open button when the garage door opener light starts flashing.
If your remote is lost or visibly broken you may need to buy a new remote.
How to fix a garage door opener remote that has stopped working.
My garage door opener is a liftmaster 1 2 hp opener.
A remote control garage door opener is a handy little electronic device that makes it possible to get into the garage without.