I just saw a discussion about someone's 30GB Ipod not charging. My 30GB video Ipod was left on for several days during Christmas and went dead. When I put it on the wall charger, although the screen was dark, it alternated between the Apple logo and a battery image with triangle/exclamation point. After leaving it on charge overnight, now I don't even get that - NOTHING! How do I get it to charge? How long should it take?