It is a series 9 4k 3D samsung tv with the model number of UN65F9000. It won’t display 4K for some reason. We have tried trouble shooting, resetting the tv and the roku, and swapping for a better 4K cable. What do I do? Can I get a older 4K hdmi cable (before 2.2)?
Thanks for the post.
What Roku model device are you using? What kind of content are you trying to watch in 4K?
With more detailed information, we will be able to assist you further.
Thanks,
Danny
What option is selected at Roku menu path Settings > Display type?