Can i put a ipad 3 logic board in a ipad 1, does the ipad air2 motherboard fit each other, fit ipad 2 logic board to original ipad, ipad 1 board upgrade, ipad 1 motherboard upgrade, ipad 1 upgrade logic board, logic board upgrade ipad 1, putting ipad 2 logicboard fit ipad 1, upgrading ipad 1 logic board, will the mother bord from a ipad 1 work.
I don't think that'll work.
I'm not sure if they're compatible, but even if they were, using a computer analogy, it's not the motherboard that's your issue, rather the harddrive. That's where the memory is. I've never seen inside an iPad so I have no idea if the memory chips are a part of the motherboard or not.
I think the only way I'd try to frankenstein and end up with two bricks is if you have absolutely no other way. Getting a hold of the original owner is totally out of the question? Because that'd be the easiest way. As soon as you pop that back off apple will wash their hands of the device and if you mess up and brick it, well you have two very expensive door stops.
If you want to proceed, I'd talk to some repair places and get their experienced advice.