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 ...

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.

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.