Trying to Connect a LCD TV to PC

I have a LCD TV with component inputs and I am trying to hook it up as a second monitor, what do I need?

You need a graphics card with a video output, or a VGA-to-video converter. But don't bother, because it won't be anything like as sharp or clear as an LCD monitor (with a VGA or DVI input). You'll just get the same 525/625 line resolution as normal TV.