This is probably a stupid question and I apologize in advance: Last night my TV went black - after trying everything I could think of I called Comcast. The excellent technician guided me through many steps as he said that the cable box was fine from his end. He finally had me plug the HDMI cable from the cable box to a different port on my Denon receiver. The cable immediately came back. So my question: Should I take this as a bad omen and get a new receiver or can an HDMI port fail but the receiver still works fine on the other ports. Thanks for any info. This forum has helped me for and hopefully will again