View Sonic Smart Board Unlock Key Combination. 

You can press the following key combination with the buttons on the front of the device. When referring to the setting button I am referring to the Cogwheel which looks like a gear.


Button Lock & Unlock 

Vol-, Vol-, setting, home 



Menu Lock & Unlock

Vol+, Vol+, setting, home



Power Lock & Unlock 

Vol-, vol+, setting, home 


If this still does not resolve your issue please contact us and create a ticket.