I did this for my father recently so that his desktop pc monitor could double as a tv. We got a HD DTA box from comcast, which I hooked up to the wall via coax. Next I had to get a hdmi switch since his monitor only has one hdmi input. One hdmi cable to his pc, the other to the HD DTA box. His pc monitor has speakers, but they were not good enough for the job. So I had an extra mini plug audio switch lying around that I hooked up as well, so that he could have the the tv audio going through his nice pc speakers. The monitor has a mini plug audio out port, so I ran an audio cable from the monitor to the audio switch. Overall it wasn't bad. I'm kinda bummed out that he has to manually switch the hdmi sources, even though it's an automatic hdmi switch. I believe the problem is the small HD DTA boxes from comcast never turn off, so the hdmi switch is always sensing a signal from the box.