First analysis of the fault should be caused by laser and its components, after open the machine cover, turning on the power supply to choose 5, after the first observation baldheaded can slide to the corresponding position, then baldheaded reset. Repeatedly commissioning, occasionally also can play. This machine use nearly six years, estimated baldheaded aging more likely, try the big power laser tube work is invalid. Analysis baldheaded can slide to the corresponding position, and adjust the working power of the laser tube, so the rule out the possibility of the laser tube transmission block and ageing. Then check the laser line and its socket, estimates that it is possible that bald in the process of moving force causing poor contact. Gently pull wiring and socket with forceps, as a result, all can't play. Unscrewing machine screw, flip movement, found that online there is a obvious crease, and a surface layer stripping and wire hardening phenomenon. Bottom line, measured with a multimeter R x 1 block, three line resistance infinity, apparently open circuit. Change into a new line, using silica gel to be fixed after electrify commissioning, fault completely ruled out.q32service manual download site