4800SE - TV out quality problems

Hey all,
Havn't had to post on this forum too much thankfully, my GeForce4 Ti-4800SE has been working great since I upgraded to my new MB, CPU and PS! (originally had problems with an underpowered system leading to massive polygon problems)
Anyways, I just got a new TV and immediately hooked up my video card to it. The old TV didn't have AV outputs so I was running it through the VCR. This new TV has AV as well as S-video inputs. So, I hooked up using the same AV cable (a high end cable, gold plated connectors) direct to the TV. Now my picture on the TV has scrolling horizontal lines. Not very prominent...kind of like old school TV's with a horizontal track...actually it kind of looks like a monitor when it is taped by a video camera and has those sloooooow scrolling bars going from top to bottom.
I'm stumped as to what the problem is. I am going to borrow an s-video cable from someone to see if it's the cable, but I don't think that it is. Interesting note, I gave my old GeForce2 MX-440 card to a friend of mine in a different town, he experienced the same problem. He had a friend come over with a laptop and hooked it into the TV (laptop was running off battery power) and no lines. Hooked the laptop into the wall and bingo....lines. That makes me think that the issue MAY possible be caused by power , but what do I do in that case? My PC and all components are running through a surge protector...do I have to get some kind of filter for the outlet or what?
Ideas? Thoughts?
Your help is greatly appreciated!
Blur66

Hi,
Sounds like a classic "hum loop", aka "ground loop".
There are multiple paths for the ground/earth/0v part of the signal path, and there is some AC mains supply getting super-imposed on the signal.
In most countries, the TV standard has a field (vertical) rate which is nominally the same frequency as the electricity mains supply (50Hz or 60Hz). However, the output from your PC is not locked to the mains frequency, hence the slow drift in the hum bars.
To eliminate the problem, you have to break the ground loop somehow. Part of the loop is the ground connection from the PC to the wall socket. That is there for your safety, so DO NOT try to break that part of the loop! Instead, try unplugging any other cables from the TV (especially if you have a cable connection) and see if that works. If it does, you might be able to get an isolator for the antenna line (breaks the DC and low frequency AC path of the coaxial cable shield) as a permanent fix.

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