Good Day and Happy Holidays!
I made the mistake of calling Dish Tech Support before Google-ing error 890 and found this helpful forum.
I got Dish about a month ago and getting the HDCP error when trying to watch football in 4K with the Joey 4K. Like the rest of you folks, Sony Bravia is new and HDMI cables are top notch so those are not the issue.
AT first I was blaming the Denon AV receiver but I took that out of line and same problem.
It does seem that when I first tune to the 4K channel, it works fine for any period of time. But when I switch away and come back, I get the HDCP (Error 890) after a few minutes.
My theory is that the keys used for HDCP get changed when you switch away and come back resulting in the error.
Given the technical people on this board, does anyone have the ability to run a sniffer between source and sink?
Thank you!