How to repair an ESP32 development board (common cases).
Cannot Turn On
When ESP32 do not turn on after powering from USB port, you should:
- Check that VIN (or 5V) pin has 5V
- Check that the 3V3 pin has 3.3V
Usually the power stage is easy to get damaged, specially in the inductor. In case the inductor (in picture) doesn’t show about 5V on both terminals then it must be replaced with another inductor or with a shortcut.