I recently acquired a number of computer monitors for next to nothing from Indiana University surplus. Amongst them are two Samsung monitors, a 15GL and a 17GLS. Both of these have a hd-15 like ...

The only time I've ever seen one of them work was when someone brought in an old AST monitor that was VGA and had a 9-pin connector. VGA card -> adapter -> nine pin monochrome monitor will not work.

What Is the 9-Pin Outlet on My Computer For?. You can probably instantly recognize the USB, microphone, printer, speaker, SD card and power connectors found on your PC.