Just found this online, any help?
How to diagnose broken DJI Phantom 2 Vision+ Wi-Fi FPV module:
- turn on vision+, extender, smartphone, dji vision app, see blank live video screen
- using notebook/pc connect to Wi-Fi network “Phantom_xxxxx”
If ping succesfull, your wifi-extender is alive and can connect to Phantom’s Wi-Fi (binding is ok). If ping fails - go no further, you are doing something wrong. Take a pause, drink coffee, think about getting some background in networking technologies, windows, etc (joke).
If ping succesfull, TOP PCB board of Wi-Fi FPV module is alive
If ping succesfull, BOTTOM PCB BOARD of WI-Fi FPV module is alive.
If ping fails - bottom PCB board (marked WM301_DM368) is broken