Recently I was bought an Apple TV which I intended to use primarily for Airplay mirroring. However, as I am also a Netflix subscriber I thought I might as well use it for that as well.
So after logging into Netflix I tried to play some content and got the HDCP content warning reminding me that the world of unhelpful, DRM continues on. Solutions to such a problem include, turn everything on and off, trying a new cable (as its a cable missing a physical strand) or get a new TV. Guess it is an illustration of a time when not all digital cables are equal.