I have a Power Mac G4 MDD model I've been working on recently that I have noticed a strange power issue with. It powers up and shuts down alright, but will not power up again unless I unplug it from the wall and plug it back in or flick the on/off switch on the power strip I have it plugged into. I changed the system battery and power cable, which made it work fine last night, but when I tested it today, I encountered the same results I had prior to the battery/cable switch. I'm beginning to wonder if the power supply is going bad, which would kill the plans I had for it. Has anyone run into an issue like this before? Is it something I can fix cheaply or will I have to buy a whole new power supply?