Hello. I have an ipad 3. It was working good until today when it went black. I tryed to push the home and on/off botton but it dosnt help. I can than sometimes see a light apple logo on the screan and stays like that. I even sometimes heard the picture taking sound when u pushed on home botton. Or whdn i connected charger to ipad it was making sometimes a sound of that thd ipad start to charge. I tryed to connect it to itunes but ask me to enter the password. And i cant. Can you help?