At school, one of the ActivPanels suddenly was not responding to touch and appeared frozen. After trying a few things, the teacher unplugged it and plugged it back in (like a hard reboot). When you turn it on, or wake it up, it asks for a PIN. The teacher never set up a PIN. The company that set it up for the school is not responding to our requests for help. So, is there a way to reset the panel or is there a generic PIN?