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Welcome to the site! I'm Dan and I'd be happy to help! Sorry to hear you're having trouble. Are you using the remote only, or have you tried the TV's own power button?
Thank you. How old is the TV? Have you ever replaced any internal parts?
Ok. Yes, absolutely. The most probable cause of the symptoms you're describing is a faulty power supply board. That's where the capacitors are. You can order the board >>here<<. Alternatively, the capacitors themselves can be replaced but that is not a guaranteed fix and it quite a lot more work.
That's right, they won't touch it after you open it. However the TV is already past the warranted period so that shouldn't matter.
Yes, they are through-hole. I am opening the service data to see if there are values for the caps listed.
Ok, the schematics show everything nicely. Could I upload a copy for you to download?
I normally don't give them away but you sound like you are experienced so I will do it for you.
Sure. >>Click here<< and see if it will download for you.
The board is TNPA6263. Schematics are near the end. It's called the P-board.
The problem is usually the large electrolytic caps.
No, there is nothing about that. Just the schematics. All of the electrolytic caps would typically be replaced, in addition to any power transistors....or the whole board.
Hope it helps.