Hello all
Marin - lots of variables to confuse everyone when it comes to SCART cables.
If your Outputting RGB from your source you need to also ensure your Display is set to 'receive' RGB - otherwise you may still be viewing Composite video.
As others have said a Fully Wired SCART cable is capable of carrying an RGB signal - along with Stereo audio.
An RGB Only cable will usually use four core cable with thicker conductors and better screening and can result in a better signal on-screen - though its not guaranteed.
You can also get RGB+Stereo Audio cables that use a six core cable to give you the best RGB transfer plus Stereo audio.
sam_roberst30 - that's way too confusing a description
If (as I suspect) your talking about the three colour coded RCA sockets on your AV Receiver (usually marked Y,Pb,Pr or Component) then no these are not generally useful for RGB signal connectivity.
RGB is in fact RGB+Composite sync so requires a minimum of Four lines to work.
If your AV Receiver is capable of simultaneously switching a YPbPr (Component) Input + a Composite video Input then you may be in business.
Best regards
Joe