Often students express fear about working on computerized sewing machines. Electronics spook otherwise confident repair students. If you consider the circuit boards and other electronic parts like DC motors as just another part, you need no fear. As with any appliance, always unplug before your open it up. Be careful of wires and their connectors. The there is no power the power board may need replacement. If a DC motor is non-responsive, a new one may be needed. Do not panic.