1.) The maximum TV-out resolution is 800x600, you may need to lower the display resolution down to 800x600 to activate the TV-out control. (depend on the driver version and model)
2.) A simple way to check the TV-out hardware is to set the display resolution to 800x600, shut down the system, disconnect the monitor, connector the TV set to the TV-out. Boot up the system. This will force the display switches to TV-out, if the TV-out function is working as it should, you will see display on the TV screen.
3.) NT 4.0 user, the above method will allow you to force TV-out enable in NT 4.0
4.) A few models of the WinFast graphics cards only come with S-video TV-out, if your TV only can take RCA signal, you will need to use a S-video to RCA converter cable. These cables are commonly available in your local electronic stores. We also tested the cable offer from www.svideotorca.com and it works nicely. DON NOT use the S-video to RCA cable from your old graphics cards, a lot of time these cables are specially designed. It may not work.
5.) If you got a Black & White picture on the TV screen, make sure you have selected the correct TV-out method (S-video or RCA) and format (NTSC or PAL)."