@retep1276 unlikely that it is a capacitor issues since it does come on eventually and it stays on. It is more likely a bad power transistor on the IC's that cause this. Remove the back of your TV and post lots of high res images of the individual boards to your question. For that use this guide It will allow us to see what you see.
@retep1276 thanks for the image. Any chance you can break it up and focus straight on the board? That way we can see more of the components. Top left of the board looks a little dark and maybe a browned label (heat?) something like this would be great
What model is your TV?