Good afternoon to everyone on this forum.
I say that I have few interventions on the Canon C9270 PRO. Until today I have always done the most common interventions, such as ITB, primary rollers, cylinders and developers.
Now I got error code E197-0013. The manual describes:

"Serial communication error. Communication error between the VIDEO Board and the scanner (Bk).
1. Check the harness between the scanner and the VIDEO Board.
2. Replace the Scanner Board.
3. Replace the VIDEO Board."

I am not confident where I should move.
Thank you in advance to those who can enlighten me and give suggestions.
Thank you very much.