Tested your cable on lg1721a (eu version), the monitor syncs perfectly at 15khz. Only late 2006 and early 2007 EU models work. (They got rgb-dtv choice in inputs menu).
Hello, I'm interested in purchasing a VGA adapter to connect my PAL A500 with a DELL U2410 monitor. Which one of the 3 offered types would be most suitable?
Every adapter or cable will work for you. When you have A500 you do not need buffered, so the cheapest adapter 1/ or cable 4/ or 5/ will be ok for you.