That sucks big time.. I had the same with my black knight. I guess we both bought from Carl Jabobs right? Turns out it the cpu thinks it’s operating under the wrong voltage and locks itself thinking its a grey import.
Great that stern implements a lock if they feel it’s needed , but I think it only frustrates buyers and distributors these days ..all other manufacturers run worldwide
My game cpu was replaced free of charge by Carl/Seeben but it took a few weeks .