P4 Firmware Firmware Update Failure/Camera not transmitting

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Woulda, shoulda, coulda. I wish I had never attempted the update but.....

Hello. I have been reading lots of threads about firmware updates failing. I have a P4P and attempted to upgrade to the latest firmware version last night. The update downloaded successfully, but would not update. I have tried reverting back to previous firmware versions to no avail. It indicates my version is all zeros. I can fly the drone, but I now have a "no signal transmission" error and no image from the camera. I have no idea what to do except to send it off for repair. I have tried calibrating the gimbal and it gets to 50% and stops. I have not opened the drone up yet and I am hesitant to do so. Maybe a ribbon cable is loose? Still doesn't explain the inability to upgrade the firmware. I have done the following:

1. I've used Android and Mac to upload/update
2. I pulled the Sd card.
3. I've attempted the update a dozen times.
4. I've tried all the above with different batteries.
5. I tried using the DJI Assistant.

Can anyone suggest what I might try?

Thank you so much.

Chris
 

Capt KO

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Are you updating using the GO4 app? Press the 3 bars for 10 secs, page top, on opening screen. The one with the phantom shown.
 
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Please tell us what you find out.

Thanks!
 

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