Canon Service Tool V6000 Upd
: Allows reading and printing of internal EEPROM data to diagnose usage history and deep-level hardware states.
If the process fails, the V6000 interface will generate an error code at the bottom of the window: canon service tool v6000 upd
While still holding Power, press the button 5 times (or 6 times for some G-series models). Release both buttons simultaneously. : Allows reading and printing of internal EEPROM