It has to be Roku tv remote if you buy an IR remote, which you can tell its a roku tv IR remote by it having a power keys and volume keys along with crescent moon key for the sleep timer. Roku tv brands like tcl, insignia, jvc, magnavox, westinghouse, onn, haier, hitachi, rca, element, and philips all use the same IR code set. Roku tv brands hisense & sharp use completely different code set then the above brands.
You can go to your local walmart or best buy and get wifi voice remote that will work with ALL brands of roku tv after you pair the roku tv to the voice remote.
IR remotes for stand alone roku's like express or premiere or any roku IR remote made in the last ten years won't work on any Roku tv's. Completely different code set.
Thanks for the inquiry.
Please contact your TV's manufacturer directly to report this issue and request additional support. Each Roku TV manufacturer provides direct support and warranty services for their products running the Roku OS.
If you need a replacement remote for a Roku TV, you would need to contact your TV manufacturer. For a list of Roku TV manufacturers contact information, visit our Community post here: Contacting Support for Your Roku TV
You can also purchase a remote that is compatible with your Roku TV here: https://www.roku.com/products/accessories/roku-tv
Thanks,
Danny