Picked up a hum when listening via the 7.1 direct input mode. At the suggestion of another member here, I moved the analog interconnects away from the AC cords I had running in the back, and everything was quiet again
Just out of curiosity, do you know what brand and type of interconnects those were? Years ago my audio system was always plagued with hums, but that was in the days when I used radio shack audio cables. I replaced all of those with better ones and I havn't had a hum problem since.