I just bought a mac pro from 2007. it won't turn on at all. I don't get nothing from the power supply. The guy i bought it from told me the power supply had a burning smell and one day just stop coming on. I did take the power supply out and open it up but can't find anything that was hot or even was burning. With it plug into the 120 volt outlet i tested for +5 volt power on rail and i have nothing. So i am lost on figuring out if the power supply bad or what. Does anybody know where i can get the pinout for the power supply? Thanks.