Canon Mb2140 Service Tool !full! -

However, remember that this tool is a scalpel, not a hammer. Reckless use—especially clicking "EEPROM Clear" or "Initialize"—can permanently erase your printer’s serial number and calibration data, turning it into an expensive paperweight.

The Service Tool will your printer unless the device is first placed into a special state called Service Mode. Steps to Enter Service Mode on Canon MB2140: Power Off : Ensure the printer is plugged in but turned off. Canon Mb2140 Service Tool

This tool is not a driver. It does not help you print documents or scan. It is purely a maintenance override utility. However, remember that this tool is a scalpel, not a hammer