Or, you may need an entire new hdtv (not just new board).
Lightning took out TV and cable box. Cable box has been replaced. Replaced the main board on the TV. Have video. Going through setup again. When trying to use smart remote the TV doesn't recognize it. Batteries have been changed in remote. Am forced to use the button on back of TV to make my selections. At one point I received message that One Connect Mini is not connected and TV will reboot. Switched inputs on smart hub. Didn't reboot anymore. When I get to the section in the setup and instructed to point smart remote at cable box nothing happens. I then get a message that this remote cannot be used as a smart remote. Anyone have any suggestions?