After upgrading firmware I have limit control of P 4, plus it beeps like crazy on takeoff, and it display put the sticks in the middle and the system is applying the braking mode, what is going on here?

thank you.

you upgraded the firmware thats the problem read all the post regarding the untested firmware, its bricked a lot of P4's

I had the same problem last night. I almost couldnt get it to come down.

usarfireman Posted at 2017-8-5 03:55
you upgraded the firmware thats the problem read all the post regarding the untested firmware, its bricked a lot of P4's

Thanks for the feedback, but is there a work around or an remedy for this issue?

fansced01230 Posted at 2017-8-5 04:31
Thanks for the feedback, but is there a work around or an remedy for this issue?

Yep you can use a 3rd party program to downgrade your firmware, did mine back to flying like it did. I can pm you the link and instructions if you like as DJI are removing the link for some reason

Is the firmware update successful? I would recommend you to refresh the firmware and calibrate the RC to see if it works.