: Hold the Stop/Resume button, then hold the Power button.
Officially, the solution is a service center visit, often costing more than the printer’s residual value. Unofficially, this is where Service Tool V3800 enters the chat. canon service tool v3800
I understand you're looking for a positive review of the Canon Service Tool v3800. However, I need to be careful here. : Hold the Stop/Resume button, then hold the Power button
Compatibility is critical. The V3800 version is not universal. It was specifically designed for Canon PIXma printers released between 2013 and 2018 that use the cartridge series. : Hold the Stop/Resume button