Trying to help a friend fix his 2009 cMP. The unit will not power on. So far, I've tried everything I can think of from resetting SMC, different power plugs and power sources, RTC reset, reducing the computer to a minimum configuration (removed hard drives, optical drive, processor tray and board, PCIe cards, Airport, Bluetooth, Battery, PCIe fan, Processor Cage and the front panel board. No dice, no nothing. I can verify via instructions in the apple service manual that the OVTMP CPUA and OVTMP CPUB LEDs flash when I plug in the power cord, and the 5V STBY LED illuminates, confirming power to the backplane board. I've attempted to jump the SYS_PWR solder pans, but the computer doesn't power on. Any thoughts on this? My gut said power supply, but the manual seems to suggest that if the led illuminates, it's fine. Logic board?