Hi to all, i have buy this 50k360g in Dominican Republic, after 21 day , i have problem on screen, on left side fron lower to hig corner i have every 5 milimeter , black line , that go to the middle of scren and after this line go to withe color, when there si a blue picture on screen is posible to see the line , white line, because the colours every 5 milimeter is different is more clear, transparent, is a problem of screen o problem of motherboard?? Thank Paolo