Canon MX722 Printer error code 6000. How do i fix this?

[JamieKim]

I have a Canon MX722 printer\scanner and it gives me an error code "6000".

 I tried a hard boot from Youtube - Hold "stop" button for 2 seconds, then "on" button at same time, release "stop" button, press\release "stop" button 5 times while continuing to hold the "on" button, release "on" button after that, wait till printer stops making noise, then turn off and on again.

THIS DIDN'T WORK !!! SAME CODE STILL.

Any ideas ?

Jamie