Hello @Spenjw,
Thanks for reaching out here in the Community!
We recommend unplugging your Roku TV from the power source for 10-15 minutes and then plugging it back in to resolve the issue. If the issue still persists, we would recommend you contact the TV manufacturer for the issue. 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
Regards,
Nimfa