My dlp is turning on..then turning off after a few minutes..someo

I would have the power supply checked for the screen and then have the power button checked it may be faulty.

Likely a bad bulb.

Try cleaning the little fans that keep the bulb cool, the temp sensor will shut it off so not to damage the bulb , the winning sound may be the fan going bad or not working like it should.

possible new bulb bad or a issue with the optical light engine.

This is a common problem for samsung DLP tvs and is due to the age of the lamp.

See this article for some solutions to extend the life, but in the end, you need a new tv or a new lamp.

http://www.ehow.com/how_4802985_fix-samsung-dlp-tv.html

Change ur picture bulb,if get getting same result sutdown,change the video board have problems.

I have the same issue, we've had to change our bulb three times in less than two years. now we have 61" expensive paper weight. Our current bulb is less than 6 months old. The TV is only 2 years old and like i said this is our third bulb.

the blue light blinks 4 times. you get sound. then a few minutes the the picture returns... then it goes out, and the cycle goes on.

A solution to this would be greatly appreciated.

This may help, we have a HP - DLP TV and it will do that when the bulb is going bad.

Its far more likely the result of the power pwb capacitors that have failed. As the 34 code will appear if the capacitors fail on the Power PWB. You can get the V26 DLP Power repair kit at the following link.with free instructions
http://servicemanuals.vstore.ca/product_info.php/pName/mitsubishi-v26-dlp-power-pwb-repair-kit/cName/repair-kits

check for popped or raised tops on caps in power supply. also try unplugging set for 5 minutes and resetting it. How about does your color wheel spin up? if your color wheel don't startup then your tv will also shut down. also check all fans they all should be running at turn on. if all fails i would say its your light engine.