I have an ATI Radeon 9550 256MB AGP video card with DVI, VGA, and S cable connections. I'm using a Samsung 19" WS (906BW) & it won't connect via DVI. But if I use the VGA, the LCD works. With the DVI connected, the monitor just sits there in power saving mode with the power light blinking. I corrected the Refresh Rate & put it into native resolution. I didn't have any problems yesterday when I used my 22" WS Acer with the DVI cable. Also, when I was trying to use my dual monitor setup, damn DVI wouldn't work now. Worked fine yesterday, but today...monitors aren't connecting.