7 years ago my Geforce4 Ti4200 would not clone display to TV, and guess what today my 8800GTS will not either. What is the problem? It detects TV but when I set up multiple display nothing shows up.  
 
Other computer with Radeon 9800 Pro works fine, clone comes right up. I need to get it working on this computer however because my old computer needs to be put to rest.
 
Anybody have any ideas?? Using a video cable with S-video adapter, running into Pelican System Selector.