Every day, one or two of my tablet's covers stops working properly. The tablets it affects are always random, and there is no rhyme or reason to it. This affects touch and type covers. 1. Volume buttons (and mute) work and show up on screen. 2. Trackpad works. 3. Tablet recognizes the keyboard is attached and doesn't pop up on-screen keyboard until I request it. The only solution I found is to "refresh" the tablet. This is time consuming and in a classroom, not very ideal - because then it has to reload the user accounts. Ideas?