@danz1man it could be the T-con board but this “then does start going faint” could be a panel issue. It does not sound like a mainboard issue.
Post some good pictures of all of your boards, with your question. That way we can see what you see. You will need a multimeter so we can have you check some voltages for confirmation.
Tell ys more about the initial flickering. I am unsure about the location that you are describing.
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