Question about Brother MFC-7820N Printer
I Had the Same Problem with a printer i got for free. I tried messing around with the back door sensor flag(spring loaded piece) but it seemed to be located correctly.
I believe the switch has dual purpose first to check for the back cover closed and to see when a paper has gone around the rollers. It would only give me the "back cover" error when a new paper was loaded and would go around the rollers. I would then remove this piece of paper and try again and it would give me the same error.
This lead me to believe that the sensor was working like it should and it could be a programming bug. I couldnt find a way to reset the printer so I took off the left side cover by removing one front and one back screw. (UNPLUG POWER OF COURSE) Then pulled each connector and plugged them back in. This seemed to reset the printer and now it works!!!!
Posted on Jan 11, 2009
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