TN421/423/426 Refill Instructions
How to refill Brother TN421/423/426
This cartridge is a plug and fill you just need to remove the plastic plug on the side and refill, But WAIT as soon as the replace toner message comes up "Don't Replace The Toner" Instead reset the cartridge follow the video on how to reset.
Please also note the cartridges that come with your printer do not have a reset cog you will have to purchase a cog and reset spring, New cartridges have the cog and spring so your good to go. BUT WAIT ONLY REFILL THE CARTRIDGE WHEN A COLOUR STARTS TO FADE DOWNLOAD THIS SWATCH THIS WILL HELP YOU TELL WHICH CARTRIDGE NEEDS THE TONER REPLACING. DOWNLOAD HERE
Just keep on resetting until you get fadeout