Explore the inner workings of switching mode power supplies in this comprehensive 56-minute video from Electronics Repair School. Delve into schematics, TV power supplies, and MOSFETs to understand their fundamental operations. Learn about amplitude and frequency modulation, and discover why these concepts are crucial in power supply design. Examine the roles of capacitors and gain practical knowledge on using multimeters, including digital variants. Observe LED behavior and low-frequency switching in action. Gain valuable insights into electronic components and repair techniques, with links provided to recommended tools and resources for further learning and community engagement.