Did swapping out mainboard require the adjustment utility or was it plug and play without having to import or program in the saved NVRM (I think it's called) from the original board?Just as an update, I've fixed it! It was a fuse on the mainboard. I don't have the eyesight/dexterity to replace the chip, so I just swapped out the mainboard. Problem fixed. It was a fuse. F5 to be exact. ;-)