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Hey Johnny,
Sorry to hear that -- the main issue with the SB3 is that the computer hosting it is not providing adequate power to the controller. Please try using another USB port or a different USB cable.
If you are not using Serato DJ Lite, please use that software to troubleshoot.
If you are using a PC and you have control but no audio output, check that Windows has not set the SB3 as the default audio device (it should be your computer's default audio interface, not the SB3).
Let us know if that works.