Unless you had previously downloaded software you will be very limited in available versions now since Microsoft no longer support N9. There are a number of software to be found in this thread:http://talk.maemo.org/showthread.php?t=96401

This can give you an idea of what is involved:http://n9.dy.fi/2014/05/comprehensiv...ware-flashing/

Main trouble is that on your "swapped motherboard" device it is anyone's guess what software version has been installed previously.