buzz/hum from tv

It is not the cable. I tried disconnecting it. The only time I have a hum is when the tv is on. The tv itself is making noise and the stereo just picks the noise up. It sounds like a real noisy tv tube. I plan on getting the tv checked out after the holidays. The tv is around 12 years old.

I disconnected the cable (no difference). Switched tv power to a different outlet(power line) still no difference. I have a dedicated power line to my system (20amp) and I am running a (Quantum octave 8) power strip from there with my amp, preamp and tv. Then another strip (ensemble) is powering my cd player, dvd player, cable box and vcr. The ensemble strip is powered by the octave also.
I do have a dimmer switch on a light in the next room, I could disconnect that or maybe just turn off that switch from the fuse panel to see if the noise is still there. Please let me know. I thank you people for your responses.

I have tried all mentioned. No Luck. I talked to a tv repair person and they said, due to the age of the tv and the noise directly from the tv, that they would check it out and possibly replace some part. I forgot the actual piece they said. I will keep everyone updated when this happens.

EMF could be the problem. I have the tv as far away from the speakers, preamp and amplifier, but I'm limited on distance. I do plan on a new cabinet soon, but my first step will be having the tv checked out. This amp I have is 24"s deep most entertainment centers are 19-20"s so I might special order one.
Maybe I can move my tv back some and see if that helps.

This does sound like the same problem. I do plan on trying to pull the tv out, as you said, and just see if the tv itself is still buzzing. If it is I might get the tv checked out. I'm waiting til after the holidays to experiment more. I'll update the post in a couple weeks.
That noise can realy drive you crazy on certain movies.
Another step would be a different rack, right now they are in a tight unit.