If the machine's display continues to show the Toner Low or Replace Toner error indication after installing a new toner cartridge, follow the steps below to resolve the issue.

1. Verify that you didn't replace an incorrect consumable by mistake.
   
   The Brother machine has separate consumables - the toner cartridge and the drum unit. Verify you replace only the toner cartridge and not the drum unit.
   > Click here to see information for the difference between the toner cartridge and the drum unit.
    
2. Verify you are using a NEW toner cartridge.
   
   When replacing the toner cartridge, you MUST install a brand new, unused toner cartridge in order to reset the toner status. Swapping toner cartridges from one machine to another or installing a partially used toner cartridge may cause this issue. If you install a partially used toner cartridge, your Brother machine is unable to recognise toner consumption correctly which will cause this issue. Therefore, when you replace the toner cartridge, use a brand new toner cartridge, not a partially used toner cartridge from another machine. 
    
3. Verify the toner cartridge is installed correctly.
   
   If you install a new toner cartridge but the "Toner Low" or "Replace Toner" error indication remains, the toner cartridge may not be installed correctly.
   Reinstall the toner cartridge, referring to the instructions on how to replace the toner cartridge.
   > Click here to see how to reinstall the toner cartridge.

   Confirm that you have installed both a toner cartridge and a drum unit in the machine.

4. Clean the corona wire.
   
   This issue may have occurred because the corona wire has become dirty.
   > Click here to see the details of how to clean the corona wire.

If the issue continues, contact Brother Customer Service from "Contact Us".