Windsor Sensor 12 Vacuum No Power

I'm an engineer for Hyatt hotels and I've worked with the S12 vacuums for a few years now. The most common problem electrically lies in the main switch and the power cord. Almost at no time in the past three years and working for 4 hotels have I had to replace any motor or board component for them. Take out the handle from the bag housing and use your volt meter/circuit tester to test the main switch, if that and your power cord are good, then you might have a bad fuse, which is located on the brush side of the main chip board. Any other questions, feel free to email me directly @ andrew.massey@gmail.com