my computer was connected to my crt tv with s-video cable for more then a year ,today for some reason i couldnt see picture, i tried to check the defenitions ,they were defined correctly ,i thought that something wrong with the cable , but the strange thing is that when define the definitions (the same defenitions i used untill now ),i get a good picture for a second and then it disapears (its like flickering ) ,so i dont know what is the problem thanks in advance for your help