I will try to help you,but need more info.Is the mc totaly dead or does same of the ligts on mc come on?If lights on mc comes on but mc can't engrave can be laser unit.Some mc got fuses in mc to protect mc.look if you don't see fuses normaly they are in plastic tube or it looks like a flat screw that you screw out and inside is the fuse.what model mc do you got?look in manual under troubleshooting for locasion of fuses if there is a manual.tell me mc tipe I will look on net for manual.powersupply do blow normaly just replace sometimes other probleme blows powersupply .


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