Did you get it from Germany? I am not familiar to what extent the Commodore machines were localized in Germany, but the mention of DIN makes me think of Germany. In that case it suggests the Kernal ROM would have been adjusted to fit German keyboard mapping and the faulty Character EPROM would be one that gives you ÃœÃ„Ã–. All the B500, 610, 710 and 720 machines I have come across and sold have been localized to Swedish conditions with EPROMs, usually with adaptors to fit a 2764 into a 2364 slot. Then again, I am aware that Sweden held a special position in the world when it came to localized Commodore computers, much higher degree than any other non-English speaking country in the world. Virtually all machines from PET 2001N to Amiga 4000 were available in localized versions.