Try another (MasterMind) TCU and run a Turbo Studio component change.
Whilst testing another TCU, Turbo Studio will prompt a Component Change. After completion, carry out any recommended updates to all components to fully check the system.
In case you do not have a replacement MasterMindTCU, you can also use a TCU (blue LED power bars) and leave it installed as interim solution for the Rider.
Try another display-motor cable that is known to be functional Tip: Before final installation, externally test any new cabling. Ensure the display cable is plugged in correctly and all unused ports are sealed with blind plugs.