When you press the power button (or short the power pins through the motherboard) the computer will turn on the front fan, spin it an inch and immediately shut down again. This happens within a quarter of a second and from what I can tell it is the only process that occurs at all when trying to boot. Since buying his new video card we have had nothing but problems with the computer ranging from a dead power supply (replaced it and got it to work for a day or two) to a hard drive failure (replaced it twice and still having problems with the new one) and we just can't seem to figure out what is causing all the problems whether it be another part of the computer or good old fashioned bad luck.