Only background showing and not working, not closing?
I have IOS 8. I was reading a pdf on Adobe last night, my charge was gone so it closed. Then I recharged it. I tried opening it. The background appears. no pass word, screen lock. no apps. no up or down manues. nothing. I tried switchin it, does not switch. I pressed the up and down bottons at the same time. apple logo appears, the screen goes blank, after a while, the same background appears. my own background. Ive tried this many times