Samsung DLP HDTV wide screen

I am hearing a loud grinding type noise coming from the inside of the tv. It sounds like some type of fan (maybe) that maybe going bad. I can still watch tv, the picture and program sounds are fine, its just that you can hear this grinding type noise. The noise that I am hearing is similar to the noise that you hear when you are using a tile saw while cutting tile. Thanks for any help offered.
Max