PlayStation Development Network

I hold this RGB cable for some years now. Any time i connected it to a H2500 i got no picture or only with a very strange frequence. I wonder anyone know if the devboards not support RGB? I also tested it with a H2000 and H2700 same results.
Depending on the pinout i wonder what the reason Sony release a RGB cable that not work? Also it look like it was pretty early on ps dev because the PS-X on the box. Anyone know more about it?

It's just a DB-9 to SCART cable with a lot of shielding. Nothing special at all. It was just an extra cable Sony made to help get developers up and running should they have had a SCART based monitor.

any chance you sell it?