I recently replaced my motherboard and power supply because my last psu died and took the mb with it. Now when I press the power button my pc begins to start-up but then powers down and then resumes starting and powers up just fine and everything works. Is my pc case power button failing? Also, can I unplug the power button from the motherboard and attach the reset button to the power button prongs on the mb and use that as the start button or do I have to have a reset button attached to the mb? Thanks for any input 
