Nothing happens when my 2G iPhone is plugged in, either to the charger or the USB connection on my Mac Pro. I've changed wires,; same problem. I've tested other devices in the USB ports; they work. When I plug the iPhone into the USB connection, nothing happens, nothing. It doesn't turn on, sync, turn off if on, no noise, nothing. The same symptoms when I plug the iPhone into the charger that uses a separate wire plugged into the charger in a different location. I've noticed this getting worse 'till now when absolutely nothing happens when plugged in. Previously, repeatedly plugging and unplugging resulted in both a charging and sync connection, depending on where plugged. Is this a phone hardware issue or am I doing something wrong?