Turns off every so often

your powersupply is dying in the set.. have it checked..

I'm not sure what TV model you have. But, thing I can tell you is the most common problem.
Most of the time with flat panel TVs, the power supply for the screen fails. And the TV normally turns itself off to protect other parts in the TV from being damaged. Basically " Protection Mode".

You can try leaving the TV unplugged for 30 minutes so the TV can reset itself; then try again turning it on. If it doesn't work after that, it's time for the TV repair shop.

you may check your lamp first. other than that i would say a faulty mains board.

I had the same problem. I deducted that if my TV worked fine for an hour or so and then the colors became bad (green, people's faces purple...), it must be a overheating problem. Simple logic, right? So, I picked up a few tools and a small vaccum and went to work.
I went first for the main source of heat: The lamp. Just a few screws, and I removed it. The lamp cage has a fine screen to prevent the dust to cover the lamp. Mine was covered with dust! And the fan behind the lamp was also covered with dust! Bingo!!! That's my problem! I cleaned everything and vaccumed all the air vents on the the back of the TV. I put the lamp back and checked that the fan was working. The TV works like new since!
Before you are out of a TV for days and spend an arm and a leg for a "Technician" to fix it (replacing expensive parts that didn't need to be replaced in the first place), try what I described above first. It's very simple and it takes only 15 minutes.
Since my TV is 2 1/2 years old, I purchased a replacement lamp. I know that one of these days it will burn out. I'll be ready and my TV will be working again in 15 minutes!
Since my problem was solved, I didn't go to the next step. There must be one or two other cooling fans inside the TV, but they must be working...
Good luck,
[email protected]

alright guys...blew a bulb....fixed that. still didint work...found out it was ballast...replaced that. tv worked for a month..all the sudden hdmi input didint work id plug in my playstation and screen would turn green and say "hdmi color has been corrupted" im thinking wtf? so a week later it works fine then just turns off in middle of watching espn... comes back on an hour later...only to turn off again...it just turns black for ten seconds then just turns off and the red and green lights blink at intervals of one second....replaced a bulb..not that, same problems.......when the tv comes on for the ten minutes before it quits working the pic and sound are great i just dnt get it...is it shorting out? color wheel bad? a fan?

TV STARTS UP AND GOES BLANK SOUND NO PICTURE

Well guys I found that if one just reads the manual you may find the solution...Mine seemed pretty simple - the room temperature was too warm! I adjusted the heat in the house, the yellow Status light went off and...it works again!
Thanks
ndre

this is very common. it is the power supply going bad. it should run at 130 volts dc. but it is now running much lower that this. just enought for the tv to come on. but not enough to power all the circuits right.

stephster, check to see if you have a reset button on the back of tv good luck-hope this works for you

hold the menu bottun for 10 seconds
after press power

see if that works