I recently acquired a PowerMac G5 (Dual Core 2.0GHZ late 05) in perfect/as new condition, including the original box. It is an Apple Certified Reconditioned Model, shipped in March 2006. Unfortunately though, it doesn't turn on. If I try to turn it on, I just get two click sounds, and the front panel LED illuminates as the button is pushed. The fans don't move. If I take the air deflector out, the Trickle Power Light comes on inside, and it is supplying power through the FireWire ports, as I charged my iPod with it. Here's what I've tried so far - Reset the PMU (the little button inside) - Removed the Battery and unplugged the system for approx 10 minutes to clear settings etc (I haven't replaced or tested the battery) - Reseated RAM and GPU - Reseated all fan connections - Reseated the two cables from the Power Supply (not the large studs) I'm thinking next I should reseat the CPU, subject to finding the correct tools. If that doesn't work, I guess I'll have to buy a new Power Supply, assuming that is actually the problem. Does anyone have any suggestions for other things I could possibly try or check.