After buying 2 used "refurbished" main boards for my P3 adv aircraft,. I need to turn to more unorthodox means to acquire one.. that works! My original one got fried in a hard landing ripping camera cable out from connector and shorting.. All systems were working after except the GPS.. After trouble shooting the systen, it appeared the power supply for the GPS system was fried. So .. the aircraft has been ground now since Feb./.. So if any you out there has a Phantom 3 Adv... that is redundant.. Let me know!!