If you are locked out and cannot log in with any default password, you have three recovery options—none of which are trivial.
If the default password was previously changed and forgotten, you must clear the system memory to restore factory settings. This process requires entering the printer's service mode. Step-by-Step Service Mode Reset Press the key on the control panel. Press the 2 key, then the 8 key simultaneously. Press the Additional Functions key once more. The screen should now display #SERVICE MODE . Use the arrow keys to find #CLEAR and press OK . Canon Ir1024 Default Admin Password