Ever spent hours debugging a board, only to find out a simple electrolytic capacitor was the culprit? The problem isn't the capacitor – it's how you're testing it. Multimeters measure capacitance, but they miss high dissipation factor (ESR). That's where an LCR bridge comes in. I show you side‑by‑side comparisons: a capacitor reads 47 µF on a multimeter (looks good), but the LCR bridge reveals low capacitance and high loss – clearly bad. If you don't have an LCR bridge, just replace suspicious electrolytic caps directly. Stop chasing ghosts and fix boards faster!