I pretty new to home theater but I’ll do my best to explain the issue am having, when I connect my cable box ( Motorola DCH-3200) from HDMI output to an HDMI input on my AV receiver ( pioneer VSX82TXS) then from my receiver HDMI out to and HDMI in to my plasma I get no picture or sound but when I go directly from the cable box to my plasma I get a picture. I do know that the cable box supports HDCP, Are there differences between HDMI cables? I need help please.