So my G4 is not starting up and I am pretty certain it is the power supply. I still have the silent PSU and fan that Apple offered a few years ago in the box and untouched. I was going to sell it by itself and then sell off my G4 at the same time until I realized its problem. Would it be smarter to sell the silent PSU/fan by itself or install them in the machine to get it working and sell the G4 with the upgraded parts. Are people even buying the MDD G4s anymore? Thanks!