Gimbal INOP, Works on startup, any suggestions?

[joebroke]

For context I bought this at a pawn shop and can't return it. I've tried, calibrating the gimbal (fails, never gets past 0%), I've inspected the cable and reseated it on both ends (also checked for corrosion and any debris) , I've tried IMU calibration, I've tried "GimbalCalib JointCoarse" & "GimbalCalib LinearHall" commands on dji-firmware-tools. I've tried refreshing the firmware.

I've already ordered another ribbon cable but looking for suggestions while I wait. I don't see any evidence of water damage on any of the PCB's. The gimbal moves on startup and camera works fine. (although it stops in a skewed orientation) Everything else also works as expected. All axis move fine without resistance.

I have minimal experience with drones, but I am very comfortable with electronics, micro soldering and troubleshooting.

Thank You!

 

[Cafguy]

Good to know you already have the skills to open it up What Drone is this.
If it moves on startup but wont calibrate then you may have a cable issue. Maybe.
Remember! Any silicone or heat paste you may remove during your fix MUST be replaced. Its best to put a thin coating of paste over the factory stuff before you re-assemble.
Did you calibrate the IMU first?