I bought a Samsung curved smart tv 4K in December of 2017 for Christmas and it's been the best tv I've ever bought, however in recent day's the left bottom corner screen of the tv appears to have melted and caused a good size black dot and vertical lines above and next to it. I know for a fact there's been no damage to it, it also got really warm with no explanation. Can somebody please help?!? Do I have to just buy a new tv? If so is this common with Samsung TVs because I don't want to buy another and have this happen.