QIDI Technology Dual Extruder Desktop 3D … – amazon.com

You will have to raise the print bed, to remove one of the boxes. To raise the bed, you will have to turn the long screw behind the platform; the one in the center. Wear either gloves or use a paper towel so the oil from your hands does not get on the screw or vise versa. The first thing I check was the voltage setting and it was set to 115V.

https://www.amazon.com/TECHNOLOGY-3DP-QDA16-01-Extruder-Structure-Filaments/dp/B01D8M32LU