My lg TV has hdmi 2.2. It lists HDR when i stream directly through the tv, but my Roku 3600r won’t show hd or 4k on auto detect. i have it set up directly to hdmi and usb charging through tv. So no other devices attached. Why does the roku not see that my display is compatible? What am i missing?
The 3600 isn't a 4k device.
Its HD though, isn’t it? According to specs it is.
It (3600) is HD, and It should detect your 4K LG TV as 1080p TV w/HDCP 1.4
As @renojim stated, you'll need a newer 4K/HDR-capable Roku model (e.g. Streaming Stick 4K or Express 4K+) if you want it to detect as 4K w/HDCP 2.2