Hiya I wanted to know where does one buy new Macintosh mainboards? I wan thinking about buying a new G4 mainboard to replace my Power Computing 604e mainboard in my computer (since it will not go beyond Mac OS X 10.2). I already know how to modify the clear case so that a G4 mainboard will fit (I do not know how to do it with the G5 mainboard). I checked the Apple store and Apple tech support, however they were not able to give me any answers. I do not want a used one off of eBay. I want a brand new one. Anyone know where to buy a new mainboard then?