Hi, my Ipad 64GB + 3G, was connected to my mac book pro 15'' it worked OK, sync was fine. Today I've decided to connect it to other Mac book pro 13'', plugged usb cable, but no signals from IPAD or Mac Book. Like no device attached to USB. Than I've made resets (on/off button, on/off+home, made resets trought 'settings' etc....)... nothing! I tried to connect it back to my initially synced 15'' Mac book pro, but no signals from Mac or from Ipad. Than I've deleted all data via 'settings', switched Ipad off. Now it asks to connect to ITuned via USB, like it happens when you just bought your IPAD and need to activated. However, again, when I plug it to any MAC or PC - NO REACTION!!! Same picture: USB cable directed towards ITunes logo! Please help!!!