Re: I need help!!!
Do you have another power supply you can swap with for testing purposes? There are a number of things that can cause similar symptoms to the ones you described. The power supply is a good starting point. If a known good power supply is installed and you have the same symptoms, then you might want to turn your attention to the motherboard. Try a CMOS reset first, sometimes you can get lucky. Try these things and let us know what happens.
But I'm trying, Ringo. I'm trying real hard... to be the Shepherd.