Sensor & PenI cannot turn on the sensor.

In order to turn on the sensor, you have to press the power button for 2-3 seconds. If you do not see any light on the power button when it is pressed, try to charge the sensor.

If the power button is pressed for 2-3 seconds and shows a blue light which soon disappears, press the Mode button at the bottom of the sensor for more than 3 seconds using a sharp-pointed object.