Before the season or a trip: so it doesn’t fail mid-air.
Dusty motors, worn propellers, outdated firmware.
Motor cleaning, propeller and gimbal check, firmware and calibration.
It depends on the model and on what we find inside, so we quote each repair individually. The diagnosis fee depends on the device, and you approve the exact repair price before any repair starts. If it can't be fixed, you only pay the diagnosis.