Samsung CLP-680ND - Dreaded "Not Compatible" Toner Cart Error

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  • holley
    Junior Member
    • Apr 2025
    • 1

    #1

    [Error Code] Samsung CLP-680ND - Dreaded "Not Compatible" Toner Cart Error

    Samsung CLP-680ND color laser printer worked dependably with mix of OEM Samsung Y and K-carts and aftermarket C and M-carts. I inserted a NEW replacement aftermarket brand M-cart and the printer immediately displayed "Not Compatible K-toner cart." error (with red LED/no print), followed by "Not Compatible C toner cart.", followed by "Not Compatible M toner cart." That's right: the printer displays THREE toner carts as not compatible, one of which is an OEM Samsung cart! Even after I put the empty cart back into the printer, it continues to display that three carts are "not compatible".

    I followed, multiple times, every recommendation that proports to be a solution to the dreaded Samsung color laser printer "Not Compatible" error:
    - Did the "Power off and unplug for n-minutes" ritual;
    - Left the printer sit "Powered-on and unused for n-minutes" ritual;
    - Removed/re-seated each toner cart;
    - Swapped old-for-new carts; swapped in another NEW (aftermarket) cart;
    - Cleaned w/alcohol all contacts on each toner cart & inside printer;
    - Performed "All Memory Clear" in Tech Mode;
    - Changed "Country" in Tech Mode, the set it back again.
    None of the described activities cleared the error and restored printer operation.

    Things I did NOT do prior to the getting "Not Compatible" error message:
    - Remove/reinstall the printer on the computer;
    - Install/update printer driver software;
    - Access printer via HTML;
    - Update ("flash") printer firmware.

    All I did is replace an empty cartridge with an identical-brand aftermarket cart. Yet this routine exercise somehow broke the printer. Is this thing destined for the curb?
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