HDTV Pro

curtg asked: My cable service is provided my Comcast and I have a digital cable box with a dual tuner dvr.

Jeannie L asked: Why do HDTV cable boxes make low-pitch buzzing noises and feel hot to the touch even when they’re off, whereas when an analog TV cable box is off is silent and cool to the touch? One time the cable box buzzed so loudly, even though it was off, that we unplugged it; [...]