.....it just flashes RGB colors. (Red, Green, Blue, Black and White.) I have to use another display just to use it. It started when I bought a new lcd display. I used my laptop to test it out and it worked fine. I ran multiple displays no problem. I left the connection on for a little while, and came back to find the laptop display flashing colors. I have a: Dell Latitude D800 w/NVIDIA GeForce FX 5200 help me out here........
Mate I gotta say i dont like Dell machines but ill help you nevertheless what u can try doin is finding the graphic drivers again by doin a google search and reinstalling the drivers. Or if u have the drivers already do a reinstall.