Thank you for replying so fast.
I have tried changing to Pal and vice versa- still black & white screen.
I don't really know what i was trying to do with Nvidia i didn't have it to start with i'd just seen it on some site and thought it might work- yes i am stupid. so lets forget about that

I don't know if it has some thing to do with the connection, but i don't think it is. I have the s video to scart and scart in the TV. I've also tried changing tv.

Thanks
oh i don't know what graphics card i have, i'm on windows xp, do you know how i could find out?