LCD shows wrong temperatur
I wanted to preheat after a heatblock-cleaning to load new filament. But the temperature shown on LCD only went up to 192°C inistead of 215°C. I realized that something was wrong as smoke came out of the nozzle. I turned off the printer, let it cool down a bit and restarted. Same experience. I then checked the voltage of the powersupply, but it was ok also during heat up. I then checked the temperature of he hotend with an infrared thermometer. The LCD stoped at 160°C this time but the infrared thermometer told me rising temperature up to 240°C. At that moment I stoped, preventing harm to the printer. Then I found this article here. Many thanks to you funnycat789. This workaround is very useful and it works!, allthough I already ordered a new board. I think I made the mistake to disconnect the heat probe while the printer was powered up. I was not aware, this might damage the board.