My Roku 4 Ultra started this a few days ago. I can use the menu but when I try to play anything the screen goes pink. I've tried all new cables, different HDMI ports, factory reset, and pulling power for an hour. I can swap in my Roku 3 and a Firestick 4k and they work fine. The Roku also wants to default to 480p if I let it automatically choose the resolution. The TV works as it should with all other devices on all inputs. My TV is a Samsung UN50NU6900 4k 50". These issues show up ONLY with the Roku 4 Ultra.
Is it time to replace my Ultra ?
I understand this is a community forum, but I hope the folks at Roku are paying attention as this seems to be happening more and more.