What I posted earlier in this thread I think I've solved, but I'm not happy really.
I tested another tv to see if it was my card that was getting damaged or the tv, and the other tv worked just fine. It's an older tv, must be 5 or 7 years old I think. But it worked on it. So I think my tv is damaged on the Svideo-In port.
I've read on most part of this forum that most people that has flickering problems have had flat screen (plasma or tft screens) and my tv is a "normal" samsung tv. So I guess I just have to get a new tv again.