Samsung 5100-5000-555P laser machine, other models similar to clear the method is as follows: 1, hold down the stop key to dial off the power, then plug in the power and press the confirm key (stop key does not put) 2, finally release the stop key and confirm key at the same time, press the confirm key 3. Press and hold the \"Stop\" button to plug in the power supply, and the display displays \"CHINESE\" to press OK. You'd better tell me the model of the machine or toner cartridge.