I had my STR-DE875 receiver hooked up to the DVD player via the DVD player's Line Out plugs and the receiver's DVD/LD line in plugs. This morning the comcast guy came over to install digital cable with HD. I wasn't there when he was doing this, so I don't know what he did back there. Anyway, I go to watch a DVD today and within a few seconds of the DVD starting, the sound seemed a little low for the volume level the receiver was at, but I figured it might just be the DVD. So as I turn it up, the receiver stops and displays the message "Protector mode" and nothing can be done unless you turn off the receiver. Once it's back on, it will go back into protector mode within a few seconds. I went to look at the connections to see if I could see anything wrong, and I noticed that there was another plug from the DVD player to the receiver. This plug was from the DVD player's Digital Out coaxial output to the receiver's Digital in coaxial input. This was something that was not there before and I can only assume the cable guy did himself. I believe that the protector message indicated a short of some sort, but I'm not sure. When I unplugged what the cable guy did and kept the same settings that I had had before (and which worked fine) I still got the protector message. When all the cables are unplugged, there is no message that pops up, but then again the receiver isn't doing anything. Is there anything I can do to fix this? Anything I can do to make the cable company fix this?