Does not turn on and the backlight is flashing
@oldturkey03 this is LG65UN7200, this one has exactly the issue "Won’t turn on and back light flashing" as roger phillips' one. I changed Power supply board by a new board but it is still being the symptom, still not turn on and back light flashes. One more thing, when I unplug the power cable of the back light led -> the stand-by light goes ON, but when plugs it in, the stand-by light not ON