Canon printers use a non-replaceable sponge pad at the bottom of the device to absorb ink during print head cleaning cycles. Over time, this sponge saturates. To prevent ink from leaking out of the printer case, Canon programs a counter into the EEPROM. Once that counter hits a specific number (usually around 7,000 to 15,000 pages), the printer hard-locks itself.
Alternatives and safer routes
Using or distributing such tools outside of official Canon repair channels typically violates Canon’s end-user license agreement and may void your printer’s warranty. Additionally, discussing or promoting these tools in a formal report could imply endorsement of practices that infringe on intellectual property rights. canon service tool v3800