There seem to be no signs of life. When I push the power button nothing happens at all. I know these macs have a power supply that is difference from PCs as far as physical shape, but it looks like a standard ATX type of connector on the motherboard, can I use another power supply from a PC and connect it up and see if it will turn on? Will a desktop G4 turn on while the case is opened? If I can use another power supply besides the main ATX connector would there be any other thing I would have to plug in to get the computer to at least power on? I know without HD's hooked up it will not boot all the way, but I just want to see if it will power on. Also I know on PCs they have little pins you can short on the motherboard with a screw driver to see if the front power switch is bad, where would these be located on the g4 desktop?