I recently purchased a Sony KF60WE610. The cable company came out and switched me to a HD box. They used composite hook up. Wanting to get the best image possible I parted with $ and got a DVI cable. I hooked that betweent the cable box and TV. Problem ... once the TV is shut down and turned back on, most of the time there is no video signal, just the message 'Your DVI display does not support HDCP use component instead'. Per the book the TV does support HDCP. When I unplug and replug the box it works ... sometimes works on it's own when I turn it on. I've had the cable company out twice and they say the signal is OK.