Numark NS6 Setup No Sound

Do you have speakers connected to your master rca? Make sure the master level knob is turn on. Press the pfl button next to the pc/line selector (red light should show) to preview in your earphones. Make sure the headphones volume is turn up, blend set to cue. You can try to change the deck a and deck b crossfader assign to center, then the crossfader will not work.