There is a porblem at the video card of this TV pls check the voltage from the power supply to this board
If then votage is there then an I C if overheating or licking ie the processor add a fan to cool this chip .
the problem is with the capacitor inside the tv the power is not being transferred from the wall to...
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the problem is with the capacitor inside the tv the power is not being transferred from the wall to the relay and to the capacitor and its too weak to power up the tv they need to be replaced and will cost up to 100 dollars to change them out the part itself is only about 7 dollars but has to be soldered into the board of the tv or something