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I have a mitsubishi tv that cuts off after about 30 seconds and lamp light is red but i replaced lamp 1 week ago.

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Hi

Well if you have replace the lamp just recently what could be happening here is that your ballast is not working properly and is to week to keep you lamp running,The definition of the ballast:
How It Works
The lamp itself typically uses AC current and about 15,000 volts to ignite the lamp's mercury vapor gas. The gases inside the lamp react when electricity charges up the mercury gas creating very bright light. The voltage drops to keep the flow of electricity to the lamp.
The lamp works with the ballast to project light into a light engine that separates the colors of the light, then recombines them with an image.
The image is then reflected on the back of the TV and then onto the screen.
If the ballast is to weak it will no have enough power to send the 15,000 volts to get the lamp ignited
You can get more check this websites http://www.partstore.com/Part/Samsung/Samsung/BP4700029A.aspx?s=froogle or http://www.discount-merchant.com/SearchResults.asp?Search=Mitsubishi+Ballast?click=52978
Please keep us posted
Samuel

Posted on Nov 16, 2009

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