What kind of cable do i need to connect a computer to a big screen tv?

this depends on the type of TV and the graphics board inside the computer.

the very easiest is new flat panel HDTVs with HDMI, VGA, or DVI connectors. if the TV has a VGA connector, you can use a standard monitor cable. if you look in the guide for your TV, it should say what the 'PC resolution' is. on your computer, (idk of you have mac or pc) you should change the resolution to match.

next if you have a normal tv. if you have a normal tv, the graphics board inside the computer needs to have a TV trancscoder. take a look at the back of the computer where the monitor plugs in. do you see a composite video plug or an S-video plug? if yes, you can connect that to the TV. you will need to check your guide on how to set that up within the computer.

with the basic TV and the basic graphics board you are gonna run into a problem. your gonna need to buy a TV transcoder which costs like $100. its a better idea to upgrade your graphics board to one which includes a TV transcoder.

If you're looking to display whats on your computer onto your tv, it really depends on the computer. Some will need the yellow rca jack, and others will use dvi.

A USB cable with the right connectors on each end.

If capable?, a dvi jack may help, but who knows for sure if it will work?