Polaroid Tv Absolutely The Worst! Can Anyone Help Me On Using My Polaroid TV As A Computer Monitor?

Can anyone help me on using my Polaroid TV as a computer monitor? - polaroid tv absolutely the worst!

Ok, I moved my office and Polaroid 42 "TV via VGA - VGA cable and audio through the red and white, but it happens to the store where it says" Windows XP "(with the small bar from left to right, @ bottom) TV says no signal. Any help here?