Disclaimer: Resetting firmware involves risk. Ensure you have a stable power supply. The author is not responsible for improper use. Always verify that your specific printer model is SCX-3401 (not 3405 or 3406).
Go to HP’s official support website and search for "Samsung SCX 3401 Firmware." Look for the "Diagnostic" or "Reset Utility" section. HP hosts legacy Samsung files directly—these are the highest quality available. Samsung Scx 3401 Reset Firmware Download High Quality
In most cases, the solution isn't a costly repair or a replacement. It is a file. Disclaimer: Resetting firmware involves risk