Symptoms: the printer doesn’t want to print and ask for a toner change, no override.

Easy reset toner counter: open the top cover, hold the * button for 5 sec (close to keypad, not back-lighted, you can barely see it).

A reset menu appears and voila! Fuck you Brother! My toner don’t need to be changed, my next printer wont be one of yours.

 

Source: https://printerthinker.com/brother-dcp-9020cdw/