Facing TV Problems? Ask a TV Technician.
Hi Ken , I`m Jack , I will be helping you today
There is nothing but the TV's main board that can do this if the tv is receiving its own channels , like no cable box connected but only antenna.
You could give a try to a firmware update to see if this will clear the problem, here is a link for that ;
Or you could replace the main board , let me know if you are into that and I will find it for you ?
Let me know if you have other questions and if not for now then please do not forget to rate by clicking on the star icons at the top, then click on Submit so i get paid for my time helping you .Also note that it will not close this post , you can come back here at any time if you need further info or help . Thank you