Question about Brother MFC 7420 All-In-One Laser Printer

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''Back door open, please close back door'' - back door is closed

Hi my Brother fax machine MFC 7420 keeps saying that the back door is open when it is not - its fully closed. I've turned the fax on and off and and plugged it out but still to no avail

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  • RobertHeins Mar 22, 2009

    After clearing a paper jam with power off, the error message "Back Door Open" appeared on the LCD when powered back on. Back door is securely closed, I've repeatedly inspected for any loose bits of paper, but the problem does not go away. I've tried opening-reclosing the back door, then pulling power plug for 30 seconds -- that does not clear up the problem either.

  • Jim Dobbs Mar 25, 2009

    I have the same problem and opening, closing, and unplugging does not work. How do I force this machine to perform full self diagnostics?

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This Error Is Reoccurring On All These Units Open Close Back Door Then Unplug For 30 Seconds And Then Plug It Back In. Check For Error.

The Brother Website Says To Check The Paper But Almost All Of These People Have Checked For Paper Problems And For Jams With No Result.

Posted on Jan 14, 2009

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Message on brother MFC7420 "back door open" when it's not


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Maybe there is broken at the back cover try to check again the back cover,inspect the cover very well .

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