Here is the procedure to Reset Your Brother TN210 Toner Levels:
1. Open the front cover that gives you access to the toners.
2. Press and hold “Secure Print” and “Cancel” at the same time. You will see “K-TNR-STD” display on the screen.
3. Using the “+” and “-” buttons select the toner you want to reset.
4. Press the “Ok” button.
5. It will display “Ok?” and hit the “Ok” button again to reset the toner.
6. Close the lid.
This process will reset the printer counter.