P4 Firmware firmware update stuck at 99% and cant restore factory defaults failed but at 0%

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when i try to update my phantom 4 it gets stuck at 99% i tried to restore factory defaults and that failed also but a 0%
 
I've had the same issue in the past. Sometimes it works right away, sometimes after 2 or 3 tries. I even think I remember once it was actually complete, but didn't "finalize" to 100%, then it was fine on the next attempt.
 
The main processor is the black board just below the gimbal.
 

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Where are you located? I am in Upstate NY near Rochester. I would be glad to help. Did it work before you tried to update?
 
Was it in a hard landing? Does it show up in the App ( GO4)? If it does can we see a screen shot of the errors ?
 
I don't know its from my school and i cant download the app on my phone
 

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