Question about Brother MFC 7840W Printer
You need to reset the count in the Menu
All the best Pineworks
Posted on Apr 26, 2010
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Posted on Jan 02, 2017
when the printer is in "ready" state, press the GO and SET at exact the same time.
Now, using the (-) < button you can choose any "service" option to fine tune te printer
TONERLIFEEND is the first in the list, press the "set" button en chose "Nothing" and press "Set" again
Posted on Jul 13, 2009
You could try resetting the toner cartridge settings. OPen the machines front door where you would replace the cartridges. On the top panel you will see a "clear/back" button. Press it and on the display you will see a reset menu come up. Arrow to each one and hit the OK button. Press "1" to reset. Once you have gone through all close the front door of the machine and press stop to bring the display back to normal.
Hope this helps.
Posted on Oct 21, 2009
If your cartridge has a lever on the left side near the rear, it needs to be reset, and there's a lever inside on the left that can stick and cause that error. You need to wiggle and pull that lever until it moves freely again.
Posted on Jan 04, 2010
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