Thank you for allowing me to assist you, my name is ***** ***** I will be happy to assist you with your concern today.
When you say that you cannot turn it on can you elaborate please? Such as it will not allow you to select and turn it on or you turn it on but it is not locating any networks.
Have you tried resetting it? If not let's have you reset it: http://www.amazon.com/gp/help/customer/display.html?nodeId=200829000
Follow the directions for the frozen screen which is a soft reset.
Let's see if that corrects the problem before we proceed.