Hello, Today, all of a sudden my TV turned off by itself. I wanted to turn it back on and it tried to, that is green blinking light came on but I could hear noises within TV, the normal ones of trying to turn on and also a couple of slightly scratching ones (not customary) and then it would turn off by itself. Unplugged TV, did a couple of suggestions on Net but situation stayed the same with same trials and shutdowns. What is it, do you think?