I assume you have a Roku TV and not a Roku device connected to a TV. The simple solution might be to get a Roku device while they're on sale this season and connect it to your Roku TV. There's no need to get rid of the TV.
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.