Ok,im new to connecting tvs with video cards. I have a navida geforce 8500 GT and im using the s-video in and out cable. My tv isnt a HD tv, its a regular tv thats about 1 year old. I can connect the video card to tv to display image, however the computer screen is off the tv. So i adjust it, however, after i adjust the screen to fit on my tv, the screen starts to flicks. So i change the refresh rate to 155 mhz, it stoped flicking however the screen is off my tv. So how can i fix that?