Nothing. Period. Help poor Canon company and buy a new Canon (which will die a programmed death immediately after warranty). This is 100% planned obsolescence, and nothing else. Shame on you, Canon!!
Being from Germany, my MX895 died after a little over 3.5 years. Started with the well known B200 error, followed two days later by "He's dead, Jim!". Having read all these cases here, it seems to be a pretty good liefetime, though. Bought the alr...