Mb2140 Service Tool — Canon

: Runs deep-level tests to verify component health and detect faults in the mainboard or print head. EEPROM Operations

: Ensure the printer is connected to power but turned off. Canon Mb2140 Service Tool

The Canon MB2140 Service Tool lies to the printer's brain. The printer thinks you replaced the sponge, but you didn't. When you reset the counter to zero but leave the old, soggy ink pad inside, you are guaranteeing an eventual ink spill. : Runs deep-level tests to verify component health

Ensure your printer is recognized in the "USB Port" section. Look for the section. In the "Absorber" dropdown, select Main . soggy ink pad inside

You cannot run the tool while the printer is in normal mode.