Recently bought a Gateway FX6860-UR21P and I had dual monitors before on my old computer. When I got this one it only had one DVI slot and a HDMI slot for monitors. I used to use VGA and DVI on the old so I couldn't use my VGA since it was "disabled" it said on the back. I bought a VGA to HDMI converter and it works for a couple seconds then the screen flickers and then shuts down and comes back up and freaks out. Can you not use a converter or anything and should I just buy a monitor that has HDMI?