Just got a brand new Ipad 3 just under a month ago from Amazon. Today when I was reading a book in iBooks there appeared a thick black line though the right hand side of the page. This got worse until the entire page was black as one progressed through the book. I turned off the device and later observed that the screen was flickering. This device is not jailbroken, has not been dropped and is usually in a leather case. My older Ipad 2 had no such problems. What is going wrong?