New to this board and hope someone can help. I have a G4 with mirrored drive doors (model#M8570). The power doesn't come on and the fans don't spin. I can't locate the test procedure or the 24-pin connector diagram (going to the mother board) to test whether it's a power supply, motherboard or other failure. This information for other G4 versions is readily available on Apple's website, but they show 20 or 22-pin connectors. Does anyone have or know where I can find this information? Thanks in advance for helpful responses.