I just got a new Lenovo laptop (B50 series), and have just tried to connect my iphone to the laptop. When I connect it, it does not charge or show up in itunes/my computer, it just makes the connection notification beep sound repeatedly the whole time it is plugged in. The cord is fine as it works with the iphone in the other computer. The same error happens with all 3 usb ports. Edit: also, all 3 usb ports work with other usb cords/flash drives. Also tried connecting an iphone 5 with its cable and that worked. Please help, I need the iphone to connect to my computer!! I couldn't find a solution online.