Please ignore this post if you did NOT encounter the problem as a result of an update!
But assuming you got bit by the update bug that seems to be going around, there may be a way to remedy the issue using SD cards to manually redo the update.
Can I guarantee the SD cards will fix the problem? No. I can't.
Can I guarantee the SD cards will not make the problem worse? No. I can't.
If you can deal with the uncertainty, I will ask a couple questions about your equipment, then mix up a "cocktail" of files to match your kit. I'll send the files along with instructions for how to use them.
Doesn't this just overwhelm you with hope and confidence? Yeah, I know. Sending for warranty work might sound real good right now.
I did the process with the SD card. thanks WTFDproject
the process worked on the other hand I still had this message ( primary gyroscope not found ) and my camera was doing what I wanted, I went out to receive GPS and I calibrated the gyroscope , I didn’t like the message ( yes finally!!! ) I calibrated the compass at the same time then the accelerometer which failed it (I start again tomorrow), I have several new alarms ( yaw, GPS and my camera E90 which turns on itself quite quickly obliged to turn off the drone to stop it , I return to as soon as possible .
Yes it was after having trouble with the update. Had to download firmware on sd card and then update via controller. After that update I had the primary gyro not found error. Since then I was successful in rebooting it via the sensor setting. Thanks for your response!