Question about Brother MFC-7840W Multifunction Laser Printer MFC7840W
You're leaking toner somewhere inside the printer. If you've recently changed cartridges...
otherwise it might be time for a good cleaning, because once unfused toner starts moving around inside a printer you have to clean every roller in the paper path.
Posted on Apr 09, 2015
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Posted on Jan 02, 2017
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