Just to be clear...I do NOT have the picap on the pi3 at the moment!!!!...
I used the pi3 brand new, everything worked fine, I attached the Hanson RPI-28D picap and WIFI stopt working, I removed the picap and ....not getting back the wifi options.
This happend to BOTH the Pi3's!!!!
Her is a link to the Hanson picap I bought November 2016http://www.hansonelectronics.com.au/product/rpi-28d/
( please remove the link if it is not ok to put it on a Falcon website!!)
So...Aldo I am a real stupid guy if it comes to networking etc, I see a patern in here.
I used the powersupply that came with the PI...It is a 5.1 volt- 2.5 A adapter.
Because I did see a little square box when flashing FPP on to the PI I also used the powersupply from my pixels.
Thats a 5.3 volt-300 A power supply..
So Power can not be the problem I think.