Thanks for sharing this here in the Roku Community, @3rdofjuly!
We understand that you are asking for a replacement for your Onn Roku TV. We'd be glad to assist.
For additional support regarding your TV, we strongly suggest that you get in touch with ONN Customer Support. Their knowledgeable team is equipped to assist you with any questions or concerns about the replacement process and warranty details for your television. They will guide you through the necessary steps to ensure you receive the help you need.
We hope everything will be sorted out for you soon.
All the best,
Emman
Emmanuel-D.
Roku Community Moderator