Please try this while the tablet is turn on.
- Press and hold the power button together with the volume down button until you hear a camera shutter sound, if no shutter sound try the power button together with volume up button.
- OR press and hold the power button for 3 seconds and then check if there is screenshot option on the pop-up.
- You can also download a screenshot app on google play store. Open play store and type "screen shot" on the search.
Please let us know if further assistance is needed.