While holding the Stop/Reset button, press and hold the button.
If the printer hangs during Step 1, the mainboard EEPROM may be locked. This happens if previous attempts to enter service mode were done incorrectly or with modified firmware. Important Disclaimer canon service tool v5610 install
WinRAR, 7-Zip, or WinZip to open the compressed folder Step 1: Preparing Your Printer (Entering Service Mode) While holding the Stop/Reset button, press and hold