2 Arris lift drones need texh support

I had an open line of Communication with AMY arris Technician in China, but now will not reply to any of my messages. Willing to pay for support. Help please

Drone 1 – Firmware Updated Per Arris Instruction

• Background: Arris authorized and instructed that the flight controller firmware be updated to PX4 v1.15.4, which was performed successfully.
• Result:
  • Compass calibration does not start
  • GPS never achieves 3D lock
  • Motors do not respond after arming
  • ESC calibration fails
•  
• CUAV’s Determination:
  • The firmware update erased all original integration parameters
  • This included essential settings for PWM outputs, compass/GPS assignments, airframe setup, failsafes, and more
  • CUAV confirmed their hardware is functional but cannot operate due to missing configuration
•  
• Key Point: Although Arris approved the firmware update, they did not provide a backup .param file, leaving the system without its required custom settings.
• Next Steps: CUAV instructed that functionality can only be restored by:
  • Reinstalling Arris’ original configuration
  • Or manually rebuilding the full airframe configuration — a complex, trial-and-error process not supported by CUAV
•  

Drone 2 – Original Firmware & Parameters Intact

• Background: This drone has not been updated. It still contains the original firmware and parameters as provided by Arris.
• Result:
  • Compass calibration fails at 99%
  • GPS will not lock
  • Motors will not arm or spin
•  
• CUAV’s Determination:
  • Since the original firmware and settings remain, and the compass/GPS still fail, CUAV suspects:
    • Wiring faults
    • Improper hardware integration at the airframe level
    • Or malfunctioning components (e.g., GPS, ESCs)
  •  
  • CUAV reviewed logs and confirmed their flight controller appears healthy, but cannot determine why systems are not responding
•  

Final Summary

• Drone 1: Firmware was updated per Arris’ direction, but Arris failed to provide a backup of their configuration, resulting in full parameter loss. Compass calibration does not start.
• Drone 2: Retains original configuration, but still fails. Compass calibration halts at 99%.
• CUAV’s Position: Their hardware is functional, but the drones are not airworthy due to:
  • Drone 1: Missing configuration after Arris-approved update
  • Drone 2: Unknown integration issue despite original configuration being intact
•  
• Path Forward: Neither drone can fly without:
  • Full parameter restoration from Arris
  • Or extensive manual reconfiguration and rewiring
•