Hello @matu ,
Welcome back to the Robotshop Community. To resolve this issue, please follow the steps in the attached video: https://www.youtube.com/watch?v=R1i8BO_eVRQ
If none of the steps in the video resolves the issue, please send us photos of the 3 sets of contact pins. Two are located on the base, and one is on the side of the cover. (Refer to the photo)
Awaiting your response,
Best regards,