I push the button to turn the tv on, it clicks then the orange stand-by light goes off like its about to come on but it clicks right back off again. I tried plugging it in to different wall outlets, used different in devices, still could not get the screen to light up. Finally, I tried holding down the power button for about 20-30sec and then after a few flashes of white the screen finally came on. My question is, what would cause this to happen? It sounds like something is going out on it, but tv's are not my expertise, can someone help me out? Thank You in advance.