Ok people, it is more than likely a bad LED but if not then it will be the power supply! If you have never repaired a LCD television then I do NOT recommend you checking the LED panel strips yourself because you to remove the LCD panel and it is extremely fragile! If you break the LCD panel then just throw the tv away because it cost almost as much as a new tv just for the LCD panel! The easiest test is to check the 2 wires (red/white) for continuity and if there is none then you have a bad led strip!