
Test resistors, capacitors, inductors, diodes, transistors, and mosfets with an inexpensive esr meter and component tester, featuring three terminals, an oled display, and a built-in frequency counter and pulse generator.
Learn how fuses protect circuitry and fire hazards by interrupting current when the rating is exceeded; distinguish fast-acting, slow-blow, and ultra-fast types, recognize fuse forms, and proper replacement practices.
Explore how inductors generate magnetic fields, store energy, and oppose changes in current, and how transformers couple coils to transfer energy and vary voltages.
Explore voltage regulators, including linear and switching types, as they maintain output voltage, discuss failures, testing, and proper part replacement.
Every broken device is a puzzle and once you know how to solve it, you stop throwing away electronics that were never truly dead.
Most people see a dead board and reach for their wallet. Engineers see a fault waiting to be found. Troubleshooting is the skill of tracking a problem to its source and bringing equipment back to life, and it's one of the most valuable, money-saving abilities you can build in electronics, whether you're starting a career or just want to fix your own gear.
I'm a Lead Hardware Engineer with 7+ years in industry, and I've built and run a professional PCB repair lab from the ground up: the kind of high-throughput environment where field failures simply aren't an option. In this course, I've distilled that real, on-the-bench experience into a clear, repeatable approach you can follow from day one.
You'll learn a systematic troubleshooting workflow: where to look, what to check, and how to narrow down to the real fault instead of swapping parts and hoping. You'll get comfortable with the tools that matter, like multimeters and oscilloscopes, learn to test whether a component is good or faulty, and find the right substitute when you need one. We'll also demystify the components that trip people up most: MOSFETs, transistors, and IGBTs, so you understand not just that something failed, but why.
This isn't theory for its own sake. The best repair techs are problem-solvers, and by the end you'll think like one: methodical, confident, and able to approach an unfamiliar board without feeling lost. When a repair calls for removing and replacing a part, my soldering course is the natural companion to this one.
Join 20,000+ engineers and hobbyists already learning with my courses, and start fixing what others throw away.