I recently got a new laptop with an S-video out port and at first I couldn't figure out how to use it either. Then I had a friend show me how. I run Windows XP so this may not work if you are running something else.
1) boot up the laptop
2) connect an S-video cable from your TV to the laptop
3) turn on the TV
4) on the laptop, right-click on the desktop and select Properties
5) in the Display Properties dialog, select the Settings tab.
- the settings tab should show you a picture with two blue rectangles, numbered 1 and 2. If not, then I can't help you much more. Your video driver may not work the same way mine does.
6) select the number 2 rectangle. This represents your secondary display (the TV).
7) select "Extend my Windows desktop onto this monitor"
- at this point, your desktop background should display on your TV. If you move your pointer off of the right end of your laptop monitor, it should appear on the TV. You can now drag windows to the right and onto the TV. This is as far as I have gone with the process. There is a "Use this device as the primary monitor" option, but it was disabled on my machine. You may have to select the number 1 rectangle and disable that option first.
- A TV's resolution is poor. My high-def TV seems to run at about 1024-768, so you probably want to set the resolution for the second screen to a low value. Even after you do that, however, I find that it is nearly impossible to read any text on the TV screen, unless it is bold and quite large.
- I've used this method for playing videos from my laptop on my TV. After some fiddling, it actually works well for this.
I hope this helps!