This is most likley due to an update in the smartboard software. 

 Is the light on your pen tray green?  if it is blinking green or black, you will not have touch. 

If it is black: most likely your USB cord from your board to your computer is unplugged.  If you find it and plug it back into the computer, you should get a solid light as well as touch.


If pen tray light is blinking green:

Open up Smartboard program/ Go to Help and check for Updates and Activation. Do any updates such a drivers or software updates.  This will take some time.

DO NOT X out or shut down your PC/Laptop in the middle of these updates. After the updates are finished, the blinking green light will turn to a solid Green and touch will work.