i built my computer myself, specs will coem later if needed. i formatted my hard drive and upon starting it up again, it wont load. it powers on, the hard drive spins and then just shuts off. everytime i try it. i have gotten my power supply tested at comp usa and it is fine, i tested my hard drive on another computer and it is detected, i have un plugged everything, like video card, sound card, usb , etc that could be the cause and still nothing, i have tried different memory and nothing. im waiting on a new p4 chip thinking that it could be my chip. ive replaced the mother board and still the same thing, please advise