My sister's Mini that I bought her as a gift is having a screen issue. She turned it on yesterday, and the bottom part of the screen is flickering, and there are vertical lines along the right hand side. She didn't drop or bang it and it is always in a case. I made an appointment to bring it in to our local Apple store but someone else said they called Apple and Apple sent out a replacement, and the process was easy. Any thoughts on which route I should go with this? I have tried restoring several times.