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Louie, Technician
Category: Printers
Satisfied Customers: 12315
Experience:  25+ yrs. experience in the field and 5+ yrs. online, down to component level.
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Brother MFC-7420 reports an error "Back Cover Open. Close

Customer Question

Brother MFC-7420 reports an error "Back Cover Open. Close the back cover" The back cover is NOT open, and nothing seems to be broken/ damaged. What can I do?
Submitted: 1 year ago.
Category: Printers
Expert:  Louie replied 1 year ago.

Hi and welcome to JustAnswer,

Thank you for the question and your patience. Should you still need assistance for information purposes only...

Initially, the described symptom almost always point to a sensor fault or false sensing.

Still, proposed preliminary tries (if have not been done) would be to open the back cover then the pull down cover to expose the fuser roller(s) (careful maybe HOT!):

  • • check/clear for a possible paper jam (most likely);
  • • check/secure/re-mount the thin plastic bar on the right side (a possibility).

All others would internal thus require partial to full dis-assembly.