You need to contact the manufacturer of your TV (TCL, onn, Sharp, etc.).
Where to get support for your Roku TV™ | Official Roku Support
Try unplugging the power cord for an hour or so an plug it back in.
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.
