Thanks for posting here in the Community!
Have you tried contacting Sharp Customer Support 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 contact them here: https://www.sharptvusa.com/support or call them at 1-888-935-8880.
We appreciate your understanding.
All the best,
Roku Forum Moderator