When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
Garage door opener light goes off then back on.
Step 2 find the two dials on the back of the power unit.
Step 5 lights still on if you find that your lights aren t turning off unplug and replug the opener.
Put the screws back in and plug the opener back in.
Each dial has a recessed adjustment screw in the center of the dial.
Your logic board needs replaced.
If this doesn t fix your problem then the problem is more than likely the safety reversing sensors.
It goes partway down reverses direction and goes back up again.
By wade shaddy updated december 19 2018 you push the button to close the garage door.
To unlock your garage door opener push the lock button for 5 seconds.
Place the stepladder under the garage door opener power unit and climb up so that you have a clear view of the back end of the power unit housing.
This brain can wear out in time so you could need a replacement.
The opener lights will flash twice and the up button will begin to flash again.
Once you see the double flash press the control button on the remote control.
To install the new bulb just screw it in.
Once you push this button the light on the garage door opener will flash twice.
Get logic board replacement.
Doing so will reset it but don t abuse this tip.