Hi @mathscitch,
Thanks for reaching out to the Roku Community!
We understand that you are inquiring about your Roku TV that has a horizontal line from the home screen. Have you tried contacting JVC Support yet to inquire further? I'd suggest starting there to see what options or suggestions they can provide. Each Roku TV manufacturer provides direct support and warranty services for their products running the Roku OS.
You can reach them here: JVC Support or call them at 1-888-582-8870.
If you have any other questions or concerns, please let us know.
Best regards,
Mary
Mary F.
Roku Community Moderator