In my job I'm employing a CM2009 IC between genuine VGA controller and VGA output connector. It is mentioned during the datasheet for this IC that I can use EMI filters on HSYNC, VSYNC and DDC channels suitable immediately after IC and ahead of VGA connector. While there aren't any https://sergiomaibu.widblog.com/86232231/emc-emi-filter-wikipedia-fundamentals-explained