i used a S-VGA video cable for the image, and another cable for the audio. I forget what the audio cable is called. I just went to best buy with my laptop and asked how i could hook it up to my tv, and they gave me the cables i needed.
when you get the cables, you have to make sure the cables are connected before you turn on the laptop, otherwise it won't work. then. just right click and go to personalization > display settings. there you can set the screens however you want.