"Gimbal overload", a tilted horizon, or shaky video.
A damaged gimbal motor, a torn ribbon, or a knocked gimbal arm.
Recalibration; if that fails, we replace the motor, arm or ribbon.
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.