Lasy night out of the blue my nook lost its wireless connection the the xfinity router upstairs and I can't for the life of me figure out how to re-establish the connection, or where to even start. Have searched high and low. Help!

First things first, have you rebooted the tablet?
Posted from my iPhone/Mobile device

First things first, have you rebooted the tablet?
Posted from my iPhone/Mobile device

Everything, reboot everything...router, modem, device etc...

-spence

dont know much about nooks but if you have a
thumb drive (and you should) you might find a little
program to install on it from your PC and the internet
then plug it into the NOOK and give it a go....like a
connection wizard.... just a suggestion