Please check the following points to reach out the problem:
- Optical check of the board, no components damaged or missing?
- Double-check the soldering
- Correct connection? Check the USB cable, try another
- Latest version of FETtec Configurator installed? Check for failure messages if ESC is connected
- Latest firmware flashed?
If this points dont solve the problem, use our checklist and contact our support via email to service@fettec.net.