I'm getting an "end of life black toner cartridge" message, and the printer cancels the printjob, but the printer won't let me access the replace cartridge option on the dropdown menu. Without access to the replace cartridge option, I can't get the printer to recognize a new cartridge, so it won't print at all. I've tried switching the cartridge anyway, but I can't get it to recognize the switch. I've also tried turning it off and on, pulling and replacing another cartridge, unplugging and replugging the machine, unhooking and rehooking the USB, but nothing will let me convince the printer to recognize/accept the new cartridge. Thanks for any assistance.
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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.
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.
When the Toner Life End LED flips on, requires you to replace the cartridge,
even when there's still toner left in the cartridge. The machine
detects end of life by shining a light through from one side to the
other. To circumvent the detection mechanism, remove the cartridge and put
a piece of masking tape over or jam a little bit of paper into the clear opening/circle on the right side
of the toner cartridge, and then pop the cartridge back in. Eventually,
you'll start seeing streaks, and then you'll know that the cartridge is
There are two units in the machine, a toner cartridge and a drum unit. The toner clips into the drum and then is inserted in the machine. If you changed the toner and you still get this message, you may have a bad or damaged toner detection sensor.
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.
There are many problems like that and its not recommended to change toner from one printer to another. but you should try: put the old toner (emty) in again, then turn off the printer, change toner and turn on printer again. if thats not helping, then maybe you have a old FW so you can try to update the firmware.
There are silver wire contacts on the left and right that are spring-loaded and touch on copper tabs on the cartridge. They may not be making proper contact. Wiping with some contact cleaner ona cloth may help, or failing that try brightening the surfaces with some fine Scotchbrite pad to help them make proper contact.