Chosen Solution
Have a LG 55lb5900 That will not power on. I have unplugged for 10min and still will not power on. Red light stays solid and does not blink. Update (06/02/2020)
not sure where some of these are located to test. Can’t I just buy a power board instead of testing each one?
kyle johnson could be power board or main board issue. We would need you to check some voltages on your power board to get a better idea. It sounds like your power board supplies the standby voltage to your main board but then it stops. Follow the flowchart for your TV
Once you remove the back cover post some good pictures of your boards with your QUESTION. That way we can see what you see. Adding images to an existing question
