Welcome to the Roku Community, @HS7!
Thanks for stopping by here and reaching out for support. We'd be happy to help you contact the right support.
In cases like this, it would be highly recommended to directly contact your TV manufacturer, as this could be a hardware issue, and Roku only supports its running software operating system.
You may reach them here: Hisense Support
We hope this will be sorted out soon.
Best regards,
Carly
Carly Y.
Roku Community Moderator