I've done everything to this machine. Had the logic board out, tried another Left I/O board, been probing around and looking under magnifying glasses for obvious shorts or damaged traces... absolute nada. Battery is good. Power adapter is the same one I use to test 20 or so machines a day on the service bench, so I can guarantee it works correctly.

If I could find another MacBook Pro for parts, or even just the logic board itself, i'd be all over the idea. It astounds me how well kept this machine is, other than the logic board of course. Barely a scratch on it.

(Oh, and for what it's worth, I have not and will not give up on the Pismo mentioned in the first post. I almost have it working. One more part to go.)