After repairing my hardly crashed Mavic Pro, I encountered this error: "Navigation system error, check redundancy state", and here's what I did to clear out this error:
- IMU calibration
- Compass calibration
- Vision sensors calibration
- GPS board replacement
- Firmware refresh V.01.04.0500
But none of these worked! And I'm just hoping I can find some other solution before going through IMU replacement.