I also belive other can help, but in this case when not dc42 have a clue why my wifi dont work and no other also that have answer
thats why i ask for the SD card files to try last time Before i send this board back for replacement.
Would you be open to trying to reset your router to factory settings, then re-configuring your SSID name and password?
I'm guessing you've updated to the latest (asus router) firmware, since Asus routers tend to notify you in the console. Perhaps this caused a configuration mis-match.