This thesis work comes from the collaboration between the Polytechnic of Turin and Spea, global leader in test equipment for electronics, semiconductor, MEMS and sensor industries. Its focus is the test of a switched-mode power supply. The motivations on which this thesis path finds its roots are the importance of testing electronic boards and the inevitable significance of power supplies in nowadays electronic. The test of an electronic board is essential for its proper and safe fabrication. No matter how careful the design and fabrication process of an electronic board could be; there will always be the possibility of defects, failures, and faults in it.