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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 :
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@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 iFixitでの質問に画像を追加する方法 for that. LG did have issues with bad capacitors so you need to make sure that you check on those.
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I have updated the post with image.
"The 7 blink code could be a power supply issue as well as a failed inverter board and lastly your panel as well"
You are suspecitng there may be no issue with the mother board ?
If you have checked the power supply properly and if you find it is working correctly then you need to look at the main board. It would be unusual but definitely possible. Can you tell or show us where the two ribbon cable from your main board go to? Do they terminate right at the panel or is there an additional board?
The two ribbon cable go directly to the panel, there is no Tcon or any other board in between. I have updated the post with the complete picture. Please check if that can help to understand you the setup.
In that case your main board is the only other alternative.
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