I have a 32T800 7629 that is doing this same thing. I can find nothing wrong, and replaced the 10uf cap mentioned above, and adjusted the G2. No change. I'm thinking it could be a bad CRT. Until a couple of years ago, it looked fine. Then, it would shut down on a bright screen image. It got progressively worse over time, until the pic was turned down so dark that you could barely see it in daylight. Now, it shuts down everytime.
Bruce
March 2009