Ok, I didn't pay attention, sorry. I saw it and I'll think about it, although I'd rather find a way to fix the ones I already got. I thought that with FIVE different motherboards I would've been able to get at least one working... but I didn't managed to, so far.
BTW: this forum is about fixing electronic devices, right? IMHO exchanging boards is not the "proper" way to do it, although with these small devices it seems more practical than finding the fault. But I believe that it's the understanding of the nature of the faults that drives us to the solution. If there's no time to do it, you just leave it and move to something else: but "repairing" should be the main reason we're all here, discussing and sharing knowledge and informations. But I'm an amateur, I don't have to deal with time and costs... a pro tech would probably see in a different way.