Chosen Solution
I have checked my power supply board is working properly. I doubt on the motherboard, can anybody please help to debug it. Motherboard part number : EAX66202603
Power board :
Capacitors are all flat and Voltage on all the pin on connector from power board to mother board is correct. Backlight is also proper, verified by shorting the test points shown in below image.
TV back side :
@helphand you did not tell us how and what you checked on the power supply board. The 7 blink code could be a power supply issue as well as a failed inverter board and lastly your panel as well. You do want to post some images of all of your boards with your question so that we can see what you see. Use this guide Adding images to an existing question for that. LG did have issues with bad capacitors so you need to make sure that you check on those.
Were you able to fix it? What was the issue?
