@harry Good new: I finally was able to flash a new firmware. I did as you describe, just connected the dash via all JTAG cable + no battery. Baam - it work. I bet I did this before - apparently not. Weird.
Sure (see below) - I double checked it, it's exactly as displayed on your picture.
Meanwhile I added an Arduino for the serial communication & reset connection - now the flashing works again in ~80% of the cases. I still assume the Creator PRO Board has something broken... Anyway, I can say the flashing problem is SOLVED (for now).
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