well, I did a bit of digging, and I found someone with a similar issue here:

http://discussions.apple.com/thread.jspa?messageID=4994036

looks like it might just be a power issue after all. Too bad I don't have any spare computer power supplies to test this theory, nor the knowledge to operate or possession of a multimeter.

Anyone have any ideas? I even harvested the VRM from my G3MT (it is a raytheon yellow board, the one from the AIO is a raytheon green board), nothing.

-digital