I recently purchased a Samsung plasma PN59D550 TV, a Samsung Blu Ray BD D6500, a Onkyo HT R590 receiver and a Cisco PVR Model 8642. I have no problems watching the Blu Ray, but when I switch to the Cisco PVR, I get a brief loss of video and audio signals every few minutes minutes . I have replaced the PVR and the HDMI cables but the problem remains. I have also tried using different HDMI ports without any improvement. I have been told that the problem might be related to HDCP issues, although all components are new and should meet current standards. The cable company has determined that the signal strength is good. Any help with this problem is appreciated.