Roku does not build and sell the TVs. You'll have to contact the TV manufacturer for assistance with any hardware issue. In your case, that's TCL. Assuming you are in the US, this is their support web site: https://support.tcl.com/us
Dan Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.