so got my printer to finally print today. did a 20 mm calibration cube a few times and it printed great and the heat sinks didnt get really hot or warm and everyhting was working great.
then all of a sudden during another test print my computer turns off and resets and so does the arduino. after that i could not communicate with the board anymore through my computer. the power light came on but the communication lights did not light up nor could i find it on my computer that it was connected. i plugged in my screen i bought off this website and the firmware and 3d printer still works. i checked some circuits and come to find that i was getting power from usb but no communication. now this was a brand new arduino mega bc the one that came with the combo i bought off here did the same thing yet still worked.
then as i was trying to print off sd and see if the printer was still working the heat sinks for y and z axis got really hot which was werid and the motors sounded different like they were struggling.
any ideas on what i did wrong or how to fix this?