I recently purchased a 2020 Roku Ultra to replace my 2017 Roku model. I had been experiencing issues with an audio delay on anything that I tried to watch that was 4k, so I figured I might as well upgrade. When getting the new one setup, I keep getting a message saying I can only get 1080p Dolby Vision, not 4k. I am currently connecting the Roku direct to my Sony XBR65X900F via HDMI, then out to my Marantz SR5009 receiver. Is the problem with my receiver, is it time for an upgrade there also?
I've tried upgrading the firmware on the receiver and even though I have it connected to my internet via an ethernet cable, it is not connecting the server and am unable to upgrade to the newest firmware for some reason.