Hello, my samsung smart tv model UN40H5203AF all of a sudden started to flicker. As in the tv screen went black and afterwards started to blink as well as the red light. I have tried unplugging it, removed power board and put it back together with no results. I also hear a faint click on the same timing as blinking occurs. I also checked to see if any capacitors were bulging or leaking but none are. What could be the problem?