The print life of Brother toner cartridges is based upon their ability to continue to achieve guaranteed print quality. As the toner cartridge is used, the supply of available toner is consumed and the functional components become physically worn. The LED indication to replace toner cartridge flashes when the supply of toner and/or material deterioration reach a level at which the print quality can no longer be guaranteed.

You can continue printing with the toner cartridge beyond its estimated print life by enabling "Continue Mode".

To force the machine to continue printing after the LEDs indicate Replace Toner, press seven times to enter Continue mode (all the LEDs blink twice, and then the Ready LED () turns on).

To return to the default setting (Stop mode), press seven times (all the LEDs blink once).