I unplugged my cable box for a couple of hours and then plugged it back in and presto, it works. i'm using hdmi to dvi for video and optical for audio. i have a feeling though it will happen again and i will have to reset the box again. just curious to know if my hdmi port is defective, the software for the box it buggy, or something else. what is causing this because i have a feeling i'm not the only one and it will happen again?