Normaly it's some colour banng problem with these. I have an older ATI radeon 9600pro in my older machine and that works fine. However on my radeon 9800pro with the Tv out i'm getting problems consistant with both a compostite and Svideo colour signals entering my tv's scart socket at the same time. The result getting a slight diagonal line pattern on strong colours . I connect up my Tv out Via S-Video cable into a scart block, and only the S-video cable. I suspect that this is the case because even though I'm only connect the S-video cable alone, i still get a colour picture in compostite mode, not the black and white one i should, i also get exactly the same interference when connecting up my dvd player if i connect up the s-video and compostite video leads to the scart adapter. Anyone come accross this before. The Svideo picture is quite a bit sharper even with lines. Anyone know how to deal with this or have any ideas about an rgb connection to my TV?