Have you tried re-seating the lamp? Pull it out and push it back in, and see if that helps. In some cases, this also helps if the TV doesn't power on, but is usually a result of moving the television, or bumping it. Of course, I'm not suggesting that happened in this situation, but what I'm recommending may help in all scenarios.
Hi the tv powers off by itself after watching for an 2 1/2 hours; i am able to turn the tv back on. in another 45 minutes it shuts down again. i have reset the tv with the menu 182 power button; with no results. please advise....thank you