I've searched, but I haven't found any info on a situation like mine. I have a 2.5ghz Quad Core G5, it is outfitted with 4 gigs of ram and 2 500gb HD's. Everything was purchased in December of 2005. Over the last 8 months or I have been getting random Kernal Panics. Sometimes the machine will be sitting unused for hours and then I'll come back to it and it's locked up. Other times do not seem to have any pattern, it can be with multiple programs open, just safari, or FCP. The machine always starts right back up with no problems and typically continues to operate for hours or days before reoccurring. I did the hardware check, and everything tested good. I switched to blutooth keyboard and mouse, and have disconnected all USB devices. I don't seen any signs of leakage. I am pretty much to the point that I assume the logicboard is bad. But I don't really know how to confirm this. Being that the machine always starts back up and never has problems consistently I really don't know what to think. I wish it could be solved with replacing the ram and/or hard drives. But I just don't know how to determine the actual problem. All I have read is a lot of speculation.