Chosen Solution
LG 47LS4600 Won’t power on. Changed power board and main board. Have tried 2 different power cords. Originally it would power on and run for about 5-10 minutes then shut off, would turn back on immediately and do the same thing. Now it won’t power on at all.
@yamamonster600 so replacing the power and mainboard did not change anything? start by following the flowchart for the power-up boot check and let us know what you get Post some good pictures of your boards and wiring with your question. that way we can see what you see. Adding images to an existing question
