Customer has an HR34-700 connected to his Hitachi 42hdt79 with HDMI and component cables. When on HDMI there are white dots that flicker on the screen and the screen blanks out for one to thirty seconds. But this only happens on the 500+ channels, hbo, starz, showtime. All other HD channels are fine. When on the component input the picture looks great on all channels, even 500+. The Element brand TV upstairs with a c31-700 is connected with HDMI has no issues. Signal is perfect install is up to code. Is this an hdcp issue or am I missing something else?