Ran into a bit of a headache this weekend trying to get a new projector to play nice with a streaming stick but it kept getting black screens until I realized the projector wasn't HDCP compliant, I swapped in a different one and boom....like clockwork, everything worked. We'd be surprised how many projectors still don't handle HDCP properly, especially when you're trying to stream from Netflix, Prime, etc, so yeah one more thing to check before you blame the cables