Insert a screw driver tip in it and slightly twist it it will remove the top of the case.
Change garage door opener battery.
Other types of remote controls have screwed in locks at the back so you may need to use a screwdriver to get the batteries out.
If you use a garage door remote and the door still isn t opening then it may be the batteries in the remote that are dead.
Remove the old battery and replace it with a new one placing it positive side up.
If the door works then you re good to go.
That garage door remote control is an extremely handy little gadget allowing you to open and close your garage door without ever leaving your car.
This remote uses cr2032 battery.
There is a slide on the side of the remote.
To replace the battery open the case.
Step 2 replace the batteries.
Check again and see if your door is opening.
How to change the battery on a liftmaster door opener remote.
If your garage door opener operates via remote control you can remove the old batteries by simply sliding the door located at the back of the remote control.