https://community.usa.canon.com/t5/Office-Printers/MF8280CW-rear-door/m-p/258971#M7947 <P><SPAN>Error says close back cover...and its closed. Cant see anything obstructing the door. Hard to make out the switch thats detecting the door open-close. Might be a sensor with a plastic flag that sticks in it not sure?</SPAN><BR /><BR /><SPAN>Canons site seemed to say that it could be a paper jam , but I dont see any signs of one. The separator pad in the document scanner feeder was popped loose, so I took it apart and re-attached it in place, but still have the error.</SPAN></P> Wed, 14 Nov 2018 14:59:24 GMT Technotronic 2018-11-14T14:59:24Z https://community.usa.canon.com/t5/Office-Printers/MF8280CW-rear-door/m-p/258971#M7947 <P><SPAN>Error says close back cover...and its closed. Cant see anything obstructing the door. Hard to make out the switch thats detecting the door open-close. Might be a sensor with a plastic flag that sticks in it not sure?</SPAN><BR /><BR /><SPAN>Canons site seemed to say that it could be a paper jam , but I dont see any signs of one. The separator pad in the document scanner feeder was popped loose, so I took it apart and re-attached it in place, but still have the error.</SPAN></P> Wed, 14 Nov 2018 14:59:24 GMT https://community.usa.canon.com/t5/Office-Printers/MF8280CW-rear-door/m-p/258971#M7947 Technotronic 2018-11-14T14:59:24Z https://community.usa.canon.com/t5/Office-Printers/MF8280CW-rear-door/m-p/259046#M7953 <P>Hi Technotronic.</P><P>&nbsp;</P><P>It does sound like there may be a sensor detection issue and it is&nbsp;recommended that you call our Enterprise &amp; Desktop Solutions Divisions at 1-866-261-9362 or 1-800-OK-CANON (652-2666), Monday - Friday 10:00 a.m. to 6:30 p.m. ET (excluding holidays). A representative will be able to continue troubleshooting with you.</P> Thu, 15 Nov 2018 18:18:33 GMT https://community.usa.canon.com/t5/Office-Printers/MF8280CW-rear-door/m-p/259046#M7953 Patrice 2018-11-15T18:18:33Z