Here's how I reset the toner error message on my Brother HL-5200DW printer: 1. Open the front door & leave open 2. Press the back button until "Machine Info" appears on the display 3. Hold the "Cancel" and "Secure" buttons simultaneously 4. Use up/down to select the appropriate toner cartridge 5. "Ok" button 6. Hit the up arrow to perform the reset 7. Close the door and print! I hope this helps people!