I just bought a Roku express 4k+ for my Yaber v6 projector and am unable to get the resolution to 1080p. I am currently using it at 720p and every time I try to put it in 1080p it reads it as such then when I go to accept it it says it can't change it.
What does it auto-detect the resolution as?
Make sure its directly connected (for now)and If you haven't done so already, try restarting your Roku.
It auto detect 1080p but when I press it it says signal unsupported.