Hl-2070n gets stuck in a toner end-of-life error condition

SOURCE: brother dcp 7020 says toner end life

unplug plug it back in, did you remove the protective cover and clean coria wire?
http://welcome.solutions.brother.com/BSC/public/us/us/en/faq/faq/000000/000000/000065/faq000065_018.html?reg=us&c=us&lang=en&prod=dcp7020_us

SOURCE: toner low, tone life end

There is a gear on the left hand side of the toner to reset the toner count this can cheated be rewinding it. Yes the design is to stop the refillers or at least slow them down a bit. If this fails purchase a new genuine toner but I have seen problems with the switch that resets the toner (Either the spring on the switch has popped off or the main board has failed).

SOURCE: MFC 8460N giving Toner Life End message

I just solved my own problem. Try it for yours. I had been using several compatible toners for the MFC-8460N with no problems until today, as I posted earlier. On a hunch, I went to the local office supply store and purchased one original Brothers TN550 toner and put it into the printer and closed the cover. Everything clicked. Toner End Life message gone. I then took that Brother toner out and put the compatible one back in and still everything was fine. Am keeping the original Brother toner as a "kickstarter" if it happens again.

SOURCE: how to get ride of Toner life end message

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.

SOURCE: Toner Life End message on DCP-7040

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.