Reset toner cartridge on Brother HL-2270DW HL-2240 HL-2230 TN-420 TN-450
Simple instructions on how to reset toner. For TN-420, press the GO button 6 times. For TN-450, press 7 times.
To reset toner on Brother Multifunction All-in-one laser printers:
• How to Reset Brother Drum DR-630 MFC-L270...