I have offically given up on repairing my power circuit on a Mac IIfx. Brand new batteries and all I just cant figure out what is preventing the power circuit from working. Everything works fine otherwise but I am left having to pop the case lid and jump start with a coin battery. Is there a good solution for mounting an external switch that can be used to turn off and on the power supply? For that matter, is there anyway to actually turn off the power supply with a switch without having to unplug it?