I just had the same pink screen problem today. When Roku was initiated, the entire screen had a pink hue. I tried resetting the system and using a different HDMI port in the TV and these efforts failed. Someone on the internet recommended cooling the unit down and placing the Roku Ultra unit on a ceramic caster to provide a cool surface and better airflow. I placed the hot unit into my freezer for 10 minutes and then found a ceramic trivet/hotplate with holes in it. I reconnected the Roku Ultra unit exactly as it had been before and placed it upon the ceramic trivet. The unit reconnected without the pink hue and it has been playing perfectly for the last 5 hours.