Whether you purchased a clone, a limited run, or an original v2.3 kit, following precise is the only way to avoid releasing the "magic smoke" (the universal electronics term for a fried component).
This article provides a comprehensive, step-by-step walkthrough. Disclaimer: This is a general guide based on common open-source schematics. Always prioritize the specific manual included with your unit. Before touching a soldering iron, understand the beast. The Fukbox is not a beginner-friendly "paint-by-numbers" pedal. It utilizes a dual-rail power supply (+9V, GND, -9V) and a charge pump that, if wired incorrectly, can send 18V straight into your audio interface. fukbox instructions
If you succeeded, congratulations. If you failed, check the solder joints on Pin 6 of the IC. That fixes 90% of "dead" builds. Whether you purchased a clone, a limited run,