Drag and drop the .hd firmware file onto the usbprns2.exe loader provided in the fix package.
Use this to fix communication errors, blinking red lights, or system freezes. Turn off your computer and the printer. Reset Impressora Samsung Laser ML 1860 1865 1867
The necessity of a reset stems from how these printers track toner usage. Unlike more sophisticated office printers that use optical sensors to detect actual toner levels, the ML-1860 series relies on a simple chip on the toner cartridge that counts pages or drum rotations. Once a predetermined threshold is reached—typically around 1,500 pages—the printer refuses to print, flashing an error light even if the cartridge still contains enough toner for hundreds more pages. For users who refill cartridges with third-party toner, or who print low-coverage text, this artificial “empty” signal is a barrier to economical printing. Resetting the printer overrides this counter, allowing the machine to continue functioning until the physical toner is genuinely exhausted. Drag and drop the