Hi,
I have recently working on Geeetech Prusa i3 Pro C model. After several normal prints, i leave the first extruder on for next print for awhile and suddenly the temperature just drops. I was unable to heat it back up, nor move any of my axis. Only heat bed is working and power supply is supplying 12V to its microcontroller GT2560. Please help me i need the printer to get working asap.