My parents just bought me an LCD screen for when I use my computer in college to save space. They said the salesman told them that LCD screens last for around 2 years. He said that the back light wil wear out in around 2 years. I have never heard of this from anything I found on LCD screens, is this true? I would like my LCD screen to last my atleast through college b/c they are quite costly. Any info is good. thx.