When I purchased my Brother Laser Printer HL-2170W, I was aware of the notorious premature “toner life end” problem. The printer has a sensor for the toner, it would stop printing when the toner is low. The problem is often times the printer stops working even when the toner is perfectly fine.
My printer stopped working when the page count is only about 650 pages. To get around this problem, there is a trick that you can do it by yourself. Here are the steps.