Thanks for the post.
It's possible that the issue you are experience may be hardware related. Have you tried contacting the Roku TV manufacturer support yet to inquire further? I'd suggest starting there to see what options or suggestions they can provide. Each Roku TV manufacturer provides direct support for their products running the Roku OS.
For a list of Roku TV manufacturers contact information, visit our Community post here: Contacting Support for Your Roku TV
Please keep us posted what you find out.
Roku Community Moderator