Need to clarify:
With the ASIAIR Pro powered on - on its own with nothing connected to it - are you able to connect to the ASIAIR fine with the ASIAIR App? Are you able to, subsequently, tell it to shut down properly via the App.
On water damage - water damage is something that can present itself over time. It's a tricky thing to deal with.
Are you sure everything is dry?
Have you tried opening up the ASIAIR Pro to really check for no signs of water damage on the board etc?
Yes - it is also possible that you may need to reset the firmware on the ASIAIR Pro. It is also possible that you may need to replace the SD Card. Don't know yet, though.