I have a friend that has an 8830 that won't sync.... it used to, but now the Blackberry Desktop Manager doesn't show that the device is connected, but yet the machine 'dings' when it's connected to the USB port, AND it shows the 'connected time' under one of the advanced tabs(not sure where exactly now, as the machine isn't in front of me). Regardless, it won't sync.... I tried uninstalling the software, and changing the USB port used, and neither worked.