The power on switch of the G5 is dead. I thought I had a PCU failure and took it to the shop where it worked faultlessly. Took it home, plugged it in with a printer and external drive attached and same problem. Unplugged all the peripherals and it starts like in the shop. Whenever the La Cie d2 is plugged in the power switch is dead and the G5 won't go. Once it's running plugging in the drive is OK and it backs up fine. All the software is up to date and I'm running Leopard. What do I do?