There are several things that can go wrong at the same time when trying to connect an arcade monitor to a modern card. Even if the card detects the monitor it might refuse to output video if no edid is found. You're in the right path by extending the desktop to the secondary output using a supported resolution. What I'd do is to use an external PC monitor to enable the output, instead of the arcade monitor. Then make sure the signal is 31 kHz (assuming your arcade monitor is the D9200), you do this by entering the PC monitor's on screen display (osd) and it will prompt the actual frequencies somewhere. *Then*, without turning your computer off, unplug the vga cable and hot-plug it in the arcade monitor. This way you make sure a proper signal is enabled. Keep in mind that laptops usually have vendor crap installed to detect hot monitor switching, so the powerpointist crowd can handle projectors. This may also interfere with this method. In short, a laptop adds more variables to the list of things that can fail as compared to a desktop pc.