If I'm playing a game and the screen goes dark in game, my monitor switches itself off. I also notice it randomly gets slightly darker from time to time and then gets brighter again. Just there now it went a lot darker than normal and appears to be staying that way, I've unplugged it plugged it back in but it is still dark. There is also a distinctive burning smell that has covered my entire room. Is my monitor on its last legs? If it matters, I have a LG M2762D