D Douglass,
I have enabled the tv out in the bios, set for the system, I have 3 items under monitors, 2 default monitor's and 1 digital flat monitor. Both are said to be working properly according to the device manager. I have a dell latitude c640 and and it has a tv out plug built in, so the video out is from the motherboard. I have tried to turn it on by using the function key like you do with a LCD and CRT. But I don't know if it is possible to do this using the function key, anyway not happened.
Thanks for any information. Roy