JohnJHughes I also do nt get the warning beep after turning the unit on.
If you do not hear the beep from a second generation ASIAIR, it probably means that it has not finished booting, and that could explain why you also do not see a WiFi signal.
Try a new copy of the microSD card image backup that you made when you first received the ASIAIR. See if the original firmware works.
If the microSD card is the problem, in the future, make sure to (1) do a soft shutdown from the ASIAIR Settings page, (2) wait for the double beep from the ASIAIR, and (3) wait for the green LED on the ASIAIR to stop flashing, before removing power from the ASIAIR. Not following this sequence can cause the microSD card to go south again (just like pulling the plug from your desktop computer).
Chen