I want to watch movies that are on my laptop on my television. I hooked up a 4 pin s-video cable to my tv and laptop. I tried it once and it worked...I was able to hear and watch my show on my tv...then I removed the wire...before I put everything away I told myself let me try one more time to see if I got it. I can't get it to work again! When I restart my laptop I see the picture that's on my laptop on my tv....it only lasts a few seconds then it cuts off, the tv shows a black screen....anyone has any ideas?