Transformer Secondary (Pin 7) --- Schottky Diode (Anode) --- Cathode --- Inductor --- 12V Output (+) | Capacitor Bank --- GND Secondary

If you have a link, PDF, or even a photo of a known working board with legible markings, that would save my day.

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A critical magnetic component that stores energy.

The controls power MOSFETs to "shape" the current, ensuring it stays in phase with the voltage.

Block-level schematic (conceptual)