If your board is not moving, unbalanced, leaning, vibrating, or not turning properly, just reset the calibration on your board.
The instructions vary by model
If your board is App-Enabled (H1, Superstar, Beast, Titan, Nomad, Eclipse, Horizon)
Vibration, even after calibration, can happen in "intermediate" or "expert" mode, because the vibration is indicating that too much pressure is being applied. These modes are much more sensitive than "beginner" mode and require less pressure on the sensors.
We recommend getting used to the board in "beginner" mode and then changing to intermediate or expert in a week or two, when you have a better feel for the board. You'll be surprised how little input your board needs, to respond to the pressure on the sensors.