@Ladyspel I would contact the TV manufacturer. This sounds like more likely a TV problem than a Roku operating system problem. If you have tried a factory reset I don't have any good suggestions. Good luck.
Thanks for the posts regarding the issue you are experiencing.
please set your Roku Remote again for TV controls. Navigate to Settings > Remotes & Devices > Remotes > [select your remote] > Set up remote for TV control. For more information about this setup process, visit our FAQ here: https://support.roku.com/article/115013019828.