Has the darkeni g problem on half the tv screen been addressed and fixed in the newer models?
Thanks for the inquiry.
Have you tried contacting the TV manufacturer to inquire further? I'd suggest starting there for more information. Each Roku TV manufacturer provides direct support and warranty services for their products running the Roku OS.
You can contact TCL Support here: https://support.tcl.com/us or at 1-877-300-8837.
All the best,