My iPod touch is not responding. I can only turn it off. When turned on, it only displays the USB connector pointing to the iTunes icon (i.e. connect to iTunes). When connected to iTunes (via USB on back of iMac), it showed up only once and said "you must restore". When I tried to restore, it said I was unable to restore. Now, it will not even show up within iTunes. Therefore, I cannot backup, restore, or do anything. Apple Support pages led me nowhere.