Currently Being ModeratedJul 27, 2012 11:37 PM (in response to chapin1951)
There may be a short circuit in the connection. If you connect only the USB cable, does this happen? Or does it happen when the cable is already connected, and you connect the iPod to the cable?
It would also be helpful to know what specific iPod model you have, AND what Mac model you have. Here's a list of all iPod models
You can also try disconnecting all other USB devices (except for standard keyboard and mouse), and then connect the iPod to a direct USB port. See if that makes a difference.