I got a refurb denon 791 receiver about a week back and I am facing issues with the HDMI ports... Couple of days back both my laptop and xbox were not displaying picture or playing sound.. I assumed the HDMI's to be defective and replaced those with my spare... Yesterday again my xbox (from the GAME port) did not connect. So i tried my older cable that I assumed to be defective and it started working... after some time the GAME port again became unresponsive... so I plugged the HDMI into the SAT/CBL port and it worked fine for some time then again stopped wrking... I tried the third port but it did not wrk at all. The last port that I have BD has my laptop HDMI plugged into it. I swapped it with xbox HDMI and it worked fine, so long story short only one of my ports seems to be working.. Does this mean that the piece is defective or can i reset the ports? What might have cause the ports to stop working? Aadesh.