Beyond my knowledge two (had spare from parted) security chips down in DH in a week.
Serial number all 00000.
Machine on location , tested some power driver boards... 5V always seems fine... cant see any other reason and don't know if always with same board.
Any suggestions before I buy new one and same story in few days.
Will check pic with programmer if I can see anything tomorrow.
Thanks in advance for any suggestion. Andrej