My Tv has been sat in the same spot pretty much for the past 7 years, I turn it on today to play a game and the top left hand corner the screen is a little darker than usual so I check settings back light etc and play around with them. Problem is still there. Turn the Tv off and all of a sudden there are these black almost wire looking prints down the left hand corner towards the mid left screen. 5 minutes later whilst I have my torch shining on the tv smoke starts coming out the back of the tv and the most awful burning smell starts to fill my room. Please help!?