Initially, the wireless icon was not showing up at all. This was fixed by manually entering details of the wireless network (such as ssid, type of encryption (WPA/WPA2) and the proper passphrase). Now the wireless icon shows up in the upper panel, and the new wireless network shows up as well.
Logging into the router shows that the D830 wireless has NEVER been heard by the router, so it has never been assigned an ip address by the DHCP server in the router. The D830 ethernet connection shows up properly in the routers listings and all the other wireless computers in the house show up properly as well. The connection to the D830 wireless laptop is totally missing in the routers listings.
While logged into the router, the proper passphrase and encryption type have been confirmed to be correct. Checking the D830's wireless setup confirms that the wireless networking parameters are properly setup. And the 'connect automatically' and the 'use this connection for all users' boxes in the D830 wireless setup have checks in the check boxes.
When the ethernet cable is disconnected, and the computer is booted, the wireless icon on the upper panel never flashes and there is no error message saying the wireless network can't be found. So it appears that the wireless in the D830 isn't even trying to connect.
Normally at least 2 other wireless networks from his neighbor's systems can be detected. But, these other wireless networks do not show up when the wireless on the D830 is interrogated.