Question about Brother MFC 7840W Printer

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Out of toner msg comes up, I replaced cartidge, do i need to reset the unit somehow

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If you put in a generic toner, you could have problems, there's a gear on the left side of the toner that resets the machine when it hits the lever inside on the left in your machine. Make sure the lever in the machine moves freely, and when all else fails try putting a piece of electrical tape over the little round window on each side of the toner cartridge to fool the machine...

Posted on Sep 30, 2009

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Posted on Jan 02, 2017

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http://www.castleink.com/265/cartridge/TN580.pdf

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