Long story short: Acquired Mac Pro, FedEx destoryed the case (Mac pro still worked), Bought a new case and swapped everything last night. So I did the swap. Checked, and double checked that everything is plugged in. When I press the power button, nothing happens except I hear a noise coming from the Power Supply. Sounds like a click/discharge noise. I've reset smc, done everything I can think of, but I still can't get the machine to come on. Anyone have any advice for me? Much Appreciated.