Hi all the USB circuit on my p3pro remote became faulity and I bought a new one from Ebay USA straight to India,I got the USB circuit in the mail today and I have installed it but the problem now I'm facing is that the remote is only charging the phone,the DJI app is not detecting it and shows disconnected in the status bar,maybe it is missing the firmware ? I tried updating the remote via the USB stick method but still no luck,what should I do ?

I found that my remote doesn't support the newer circuit boards,mine had 3 ICs on it Will an HDMI output upgrade work or  not ?

Not sure if this is any help or not, but all android devices have an option as to how the USB is recognized. You can pick between charging or Media transfer. It is under USB configuration, or most of the times you can swipe down on the main screen when attaching the USB cable and change it there too. You may already know this, but thought I would throw it out there. Good Luck!

Make sure your phone is using the MTP mode while connecting. Also, 300A\B\C model uses different USB circuit.Pay attention to this.Changing another USB cable is also an option.

my phone connects in USB debugging mode,a tried a friend's phantom and the controller was working on my phone.This was the circuit which was installed on my remote

this is the circuit which I bought from Ebay
http://i.ebayimg.com/00/s/MTYwMFgxNjAw/z/7pMAAOSwcLxYGvfO/$_1.JPG