I have a ipod 3g 40GB ( the old one with the buttons above the wheel) that a friend gave me. I used it all day today listening to his music. When I got home I plugged it in to my PC and a message popped up saying that it was formatted for a mac. I restored the ipod so I could get my music on it and when it rebooted itself it shows a sync cable and an arrow and then cuts itself off. I can not get it to boot anymore. Has anyone had this issue before? If so what did you have to do to fix it?