Be interesting to see how other people have resolved this error. And how many people have had to either scrap the printer or buy a new mainboard (ouch!).
I'll chime in. I had to scrap mine, iPF8100 due to mainboard failure and I got the iPF8400.
Now my new iPF8400 has pinch roller problems which makes depressions on every media except canvas and it also has a chronic gamut shrinking problem, and microbanding issues. Canon has spent 42 days doing nothing despite being aware of the problem. Canon Singapore here. The technician told me that my printer is not important (read: its cheap crap to Canon) because he had to deal with a $500, 000 grand format printer (this due to the Oce merger). I was made to wait for days and he took back samples and did nothing for 2 weeks or so and then went on leave. Upper management has taken over and the information has been passed from local to regional level and now to Canon Japan HQ. 12 days now and still no news.
Good luck to everyone else out there with mainboard or other issues. Epsons clog, Canons self-electrocute.