Hi,
I have an early MAc Pro (Original) that I suspect has a faulty PSU. I now that the simplest way to test would be to swap with one that works but I dont have access to one. DOes anyone know how to test the PSU. I cannot find specs for the voltages on the PSU connector anywhere. Also I have access to a Mac Pro (early 2008) but I am not sure if I can just pop this PSU in the MAc Pro original. Does anyone know? Also I believe that it may be possible to use a 3rd party PSU but again I cannot find any details on how to go about dong this. Any help greatly appreciated.

Thanks
Greg

Does it power up at all with any indication (light on the front)? Did you try the trick I talked about in the forum post Mac Pro lesson learned (http://macosx.com/forums/mac-os-x-system-mac-software/321319-mac-pro-lesson-learned.html)?