Solve : pls help?

1.	Solve : pls help?
Answer» i replaced the power supply in my emachine w3503 now it powers up but as soon as the light on the moniter comes on it shuts down again its running xp and has ATi Radeon Express 200 in it its an Intel celeron D356 33.3GHz . i dont really know what else to put on here about it if ne one knows ANYTHING that MAY help me i would really APPRECIATE your taking the time to let me know thank you Did the system work before you replaced the power supply? What size is the power supply you are putting in? I had the same problem once and the supply I was trying to install was too small for the system.

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