Re: DOA Motherboard or CPU?
Likely a grounding problem.
Un attach everything except one stick of RAM, Heat sink and CPU, video card and power connectors to motherboard and Video card.
Take the motherboard out of the case and place it on a NON conductive surface.
Try turning it on now.
If the same thing happens, clear CMOS and reseat the RAM and video card.
If the same thing happens, take the memory out.
Turn it on, if the same thing happens its probably a bad power supply.
If the motherboard Beeps many times (as it should with no RAM) then it means that the RAM is bad, try all sticks until it works.
You may have to RMA all the sticks if it gets to this point.