https://community.usa.canon.com/t5/General-Discussion/got-an-error-message-quot-unable-to-change-51-quot-for-my-MFC/m-p/159417#M24825 <P>That is not a Canon printer, but I did find this possible solution.</P><P>&nbsp;</P><P><A href="https://answers.yahoo.com/question/index?qid=20101024091200AAm4hfR" target="_blank">https://answers.yahoo.com/question/index?qid=20101024091200AAm4hfR</A></P> Tue, 22 Dec 2015 16:00:00 GMT jrhoffman75 2015-12-22T16:00:00Z https://community.usa.canon.com/t5/General-Discussion/got-an-error-message-quot-unable-to-change-51-quot-for-my-MFC/m-p/159414#M24824 <P>got an error message "unable to change 51" &nbsp;how do I clear?</P> Tue, 22 Dec 2015 15:37:27 GMT https://community.usa.canon.com/t5/General-Discussion/got-an-error-message-quot-unable-to-change-51-quot-for-my-MFC/m-p/159414#M24824 dakells1 2015-12-22T15:37:27Z https://community.usa.canon.com/t5/General-Discussion/got-an-error-message-quot-unable-to-change-51-quot-for-my-MFC/m-p/159417#M24825 <P>That is not a Canon printer, but I did find this possible solution.</P><P>&nbsp;</P><P><A href="https://answers.yahoo.com/question/index?qid=20101024091200AAm4hfR" target="_blank">https://answers.yahoo.com/question/index?qid=20101024091200AAm4hfR</A></P> Tue, 22 Dec 2015 16:00:00 GMT https://community.usa.canon.com/t5/General-Discussion/got-an-error-message-quot-unable-to-change-51-quot-for-my-MFC/m-p/159417#M24825 jrhoffman75 2015-12-22T16:00:00Z