: Ensure the downloaded file is a compressed ZIP archive. Always scan the extracted Service Tool V3400.exe with reliable security software before running it.
Before downloading, confirm your model number. Using the wrong service tool version can permanently corrupt your printer’s EEPROM. download service tool v3400 printer canon hot
Press and hold the button (red triangle), then press and hold the Power button. : Ensure the downloaded file is a compressed ZIP archive
Because Canon has recently pushed firmware updates that lock out third-party cartridges and brick devices after waste pad overflow. This specific tool (v3400) is the only one currently bypassing those new checks for models like the MG3420 and MG3620 . download service tool v3400 printer canon hot