My power mac crapped out on me the other day. It first wasn't recognizing the front USB port then it just flipped off and never came back on. When I press the power button nothing happens. I tried pressing the PMU reset button and nothing happened. I tried taking out the battery and still no results. My guess is it is either the power supply or the logic board. Is there any way to find out what is the problem without taking it into apple and paying a fortune. I'd like to try to fix it myself if possible. Or does anyone have any recommendations for repair shops. I live in the chicagoland area. Thanks a bunch.