: Keep holding the button and plug the power cord back in.
To successfully retrieve the firmware, you cannot just use part07.rar alone. Download NT72667V01 3840x2160 Nordmende ND55K4000 part07 rar
The file name identifies several critical components for your television: : (Nordmende 55-inch 4K TV). : Keep holding the button and plug the power cord back in