In my job I'm using a CM2009 IC between genuine VGA controller and VGA output connector. It really is mentioned while in the datasheet for this IC which i can use EMI filters on HSYNC, VSYNC and DDC channels right following IC and ahead of VGA connector. While there are https://lukasgcefg.widblog.com/86259939/how-emi-emc-test-list-can-save-you-time-stress-and-money