Disclaimer: Modifying printer firmware may void warranties. This guide is for educational purposes. Use at your own risk.

If you own a or SL-M2168 monochrome laser printer, you’ve likely encountered a frustrating roadblock: the printer refuses to print, displays a “Replace toner” or “Toner exhausted” message even with a full cartridge, or—worst of all—shows a cryptic error code #676 on the screen or in Samsung’s Printer Status program.

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