The Toshiba U920t series is a sleek and versatile device that combines the functionality of a laptop with the convenience of a tablet. To help you make the most of this innovative product, we offer a user manual that you can download for free from manualshive.com.
If you are still unable to solve the problem and suspect that it is hardware related, visit TOSHIBA technical support website http://www.toshiba.co.jp/ worldwide/.