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Description of Problem 100000028220

Why do the Toner and Error LEDs continue to appear on the display after I replaced the toner cartridge?

Description of Solution 200000036167

This solution is to be used only when the Toner and Error LEDs are on immediately after a new toner cartridge has been installed.


Brother strongly recommends that customers use only genuine Brother drum units and/or toner cartridges. Each Brother laser printer is designed to work at pre-set temperatures that are matched exactly to each of our individual toner formulations.  Each individual component is designed to work with the other to ensure quality and reliability. Using non-Brother supplies may affect the hardware performance, print quality and machine reliability. The Brother limited warranty does not apply to any problem that is caused by the use of third party drum units, toner cartridges or toner.



1. Did you replace the toner cartridge with a NEW, out of the box, genuine Brother toner cartridge (TN720 or TN750).


-  If a toner cartridge from another machine was installed (even if there is still toner left in the used cartridge) it will not clear the Toner and Error LEDs.


2. Open the front cover and remove the drum and toner assembly.





NOTE: We recommend placing the toner and drum assembly on a piece of paper in case of accidental spill or scatter toner.


3. Remove the gray toner cartridge from the black drum by holding down the green lock lever on the right side of the drum unit and lifting the toner cartridge out.


- If there is no gray cartridge installed, you will need to install a new TN720 or TN750.





4. Gently shake the toner cartridge from side to side.




5. Reinstall the toner cartridge into the drum unit and you will hear it lock into place. If you put it in properly, the green lock lever will lift automatically.





6. Reinstall the drum and toner assembly into the printer and close the front cover.





7. If the error is not cleared, the toner cartridge has reached the end of its life and will need to be replaced with a new, unused genuine Brother TN720 or TN750.


- If the toner cartridge has already been replaced but the error was not cleared, call Brother Customer Service at 1-877-Brother (1-877-276-8437).


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