I have a loud hum when I connect my new Sony LCD HDTV to my HD cable box. Here's my configuration:
Coax from wall to HD cable box Cable In coax
RCA cables red/green/blue out from cable box to Component 1 red/green/blue inputs on TV
RCA Audio red/white out HD cable box from to Component 1 Audio In red/white on TV
This is when the hum starts. If I unplug the RCA red/white cables from the TV, the hum stops. But of course, then there is no TV sound. If I use coax cable instead of RCA cables, the hum stops, but the video is very poor.

Know a fix?

Hello, I need some help with a system I have in mind.

I listen to most of my music through a computer and for starters I would like to upgrade my off-the-shelf PC speakers. Which direction should I look? Perhaps some active powered monitors?

I also have a Technics 1210 turntable and a gaming console that I would like to listen to through those new speakers as well. I assume I need either a receiver or perhaps some DJ mixer with 3 channels?