you post a link to the information about your board and you come here asking questions about it which could be found on the website you provided if it does not have an s-video port then it does not support S-video
On the contrary, TV-out is available on many video cards through the DVI and D-sub ports. An s-video port on the card is not required. The video card has to support it, then an adapter can be installed for use. This is a common feature.
However, I have never used onboard video like this, so I figured I might ask someone who has some experience.