Gday mate, I've got a fully working n900 here at home, and also a bricked n900 here with no USB port. I was a ****** and installed CSSU on a phone with no USB port. I did have a way to charge that phone that's why I was using it. So as it is I'm 110% sure the mobo works if you want the whole phone as is is send it. Again it has no USB port.

And I'm in Australia.

Cheers