• V3000 series: Older, works on pre-2008 printers.
• V4000 series: Introduced support for the MG5400/6400 series.
• V5204: Known for broad support of PIXMA models released between 2010 and 2016, including MG2200, MG3200, MG4200, MX470, MX490, and iP7200 series. It is also the last version that many “unofficial” techs found stable before Canon moved to encrypted service modes on newer models (2018+).

Release both buttons. The green light stayed steady—the printer was now in Service Mode

Resetting Waste Ink Counters:

Even if the physical pads are cleaned or replaced, the printer hardware will continue to display a lockout error until the internal counter is electronically reset via the Service Tool . canon service tool v5204