After some restarts my iPad has no sound at all even when I put my passcode in I get no sound! I try an app to play music and get nothing at all. I restart and restart many times and finally get sound. I also have a problem with my headphone jack working properly. Both sides of the headphones do not work at the same time unless I get it plugged in just right! I think the jack and no sound problem are connected ! Do not see any settings to change.