I got this iPod nano (4th gen) for Christmas and am wondering the terms of the limited one year warranty that comes with it? Are sudden malfunctions (i.e. the screen doesn't come on but the click is heard when I press play, menu, etc...) covered? I haven't dropped it and literally listened to it with my aux cable in my car a few hours before this happened. Any idea/advice on what's wrong? The screen doesn't come on but the "click" is heard when I press play or menu.