A: Electrostatic interference with the motherboard or signal transmission error. You should install and check the ground wire, update the data cable or change the computer.

There are 4 points to be check:

(1) Check electric current. Press“TEST”button on machine screen board.If there is not electric current showed on screen board, you should try to make sure all wires are connected well. If there is electric current showed on screen board, maybe the lens is broken,laser tube light exit and lens are contaminated. Or the light path off set.

 (2) Check water cycle. If there is not water cycle, maybe the water pump damage. If there is water cycle, please check whether the inlet and  outlet are connected in reverse, or pipe fractures.

 (3) If a dot emit light. If there is not a light,please check the wire between the engraving machine control board and the power supply is in good contact.

 (4) If above is no problem, maybe machine power damages, you should repair it.