How to reset TN420 & TN450



  • TN420 & TN450 Toner Reset Instruction??



  • For people who use Brother Printers which use TN-420 or TN-450 toner cartridge will encounter toner error such as “Toner Low”, “Replace Toner” or “Toner Life End”. As the screen shows the cartridge you are using is empty or not recognized, you think you have to replace a new toner cartridge, or you can not continue printing. But after installing a new cartridge, the problem still exists, and you will find this happen with both OEM and compatible laser toner cartridges. It doesn’t mean the cartridge you bought has damaged, the reason is the cartridge didn’t reset properly, so the printer couldn’t recognize it as new. Don’t worry, it is easy to reset:

    Brother-TN420-Original-Black-Toner-Cartridge
    Brother-TN420-Original-Black-Toner-Cartridge

    Brother-TN-450-Original-Black-Toner-Cartridge-High-Yield-Version-of-TN420
    Brother-TN-450-Original-Black-Toner-Cartridge-High-Yield-Version-of-TN420
    For Brother DCP/MFC Series:

    Open the front cover to the toner/drum section of the printer.
    Press the Clear/Back button and the following message should appear in the LCD display “Replace Drum? 1. Yes 2. No”
    Reset the counter in the following procedure by printer model and toner type.
    MFC models with numeric keypads
    TN420 standard toner: Press the *, 1 and 1 button in this order
    TN450 high yield toner: Press the *, 1 and 2 button in this order
    Unknown Toner Type: Press the *, 0 and 0 button in this order

    DCP models without numeric keypads
    TN420 standard toner: Press the “Start” button, and press “arrow up” or “arrow down” button to display “11” on the LCD display. Then press the “OK” button.
    TN450 high yield toner: Press the “Start” button, and press “arrow up” or “arrow down” button to display “12” on the LCD display. Then press the “OK” button.
    Unknown Toner Type: Press the “Start” button, and press “arrow up” or “arrow down” button to display “00” on the LCD display. Then press the “OK” button.The message “Accepted” should be appear on the LCD display.
    After 2 seconds, “Cover Open” will appear on the LCD display.
    Close the front cover and the operation is now completed.
    For Brother HL Series:

    Turn off power to the printer.
    Open the front cover to the toner/drum section of the printer.
    Press and hold the “Go” button while turning on power to the printer.
    Release the “Go” button after “Toner, Drum, and Error” LEDs turn on with the “Ready” LED turn off. All LEDs will now be OFF.
    Press the “Go” button 2 times – The “Toner, Drum, and Error” LEDs will turn ON.
    Press the “Go” button 6 times for a TN420 or Press the “Go” button 7 times for TN450.
    Close the front cover after Error LED starts to flash.
    The reset procedure has been completed.


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