While still holding Power, (or 6 times for some G-series models). Release the Power button .

: Windows 7, Windows 8, Windows 10, or Windows 11 (32-bit or 64-bit). Note: macOS is not supported.

If you reset the counter multiple times without cleaning or replacing the cotton pads inside the machine, waste ink will eventually overflow out of the bottom of the printer casing. This can ruin your desk, stain your floors, or short-circuit the internal electronics of the printer.

The Canon Service Tool V5204 was a digital skeleton key. It wasn't found on shiny corporate landing pages or in the "Support" tabs of official websites. It lived in the corners of the web—on archived forums where retired engineers shared secrets and in encrypted directories maintained by right-to-repair rebels.

The Canon Service Tool if your printer is turned on normally. You must manually boot the hardware into "Service Mode" first. Follow these steps precisely:

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