Hallo kevin_intel, thanks for replying to my post.
Before I buy new hardware, is there a way to diagnose the problem and to find the weakest link in the chain (regarding HDCP version) or at least to check the supported HDCP version of my HD4000? Theoretically, it might be a hardware bug or some incorrect sent signal as well(?).
Moreover, is there some official/general FAQ regarding HDCP, that is, how to cope with HDCP when buying new hardware, can I, in the future, update the HDCP version current hardware with a new firmware? For example, I buy a new TV supporting HDCP 2.1 and everything compatible, that's fine. But after releasing HDCP 2.2 I get a new blueray player and I'm forced to buy new hardware or at least to wait until I get corresponding HDCP updates for ALL hardware. And if even one manufacturer does not deliver, I got the weak link in my HDCP chain and the problem starts again.
So you see, for me it's just not the current problem, but I am really at loss here how to cope with this issue in the future...