i have a 47in tv.it is a samsung and i bought it about 3 years ago and about 6 months ago it started with a small blmish at the left side of the screen.since that time the blmish has grown into a smugy sterak that is growing from the top of the screen going down the screen like a lighting strike. is this something that happenes in these type tv or have i bought a tv that allready worn its selfe out?if you have any thing you can offer please let me know.