I have the new iPad and when I am using it and after a period of inactivity the screen goes black. If I touch the screen immediately after it goes black the screen comes back up. However if I wait a few minutes and tap the screen it doesn't come back up and I have to hit the home button to revive the screen and it goes to desktop. Is there a setting to keep it from going to sleep? I looked in settings but could not find a way to keep the screen from going black. thanks for a reply.