After too many discussions it appears the fix is to use HDMI for HD and SCART when the content is less than HD.
Your post is rather confused since you lead with the Virgin box and then write about a Sky box.
I seek your help regarding my
50" Samsung tv model No: PS50A456P2DXXU
I have a virgin cable box connected via HDMI lead. which works prefect. However when i use my virgin box connected via a scart lead, the image is extremely poor. If a dark scene appears in a picturethe bright colours blend into the dark background, for example, if its a night scene, you cant see the persons dark hair, it looks like 1 dark colour. however though HDMI is fine.
I tried both scart socks, the same problem occurs, when connected through with Audio and Video cables, also tried different cable and sky box, the image still has this problem, but with HDMI connection is fine.
I ask because i want to connect my sky box via scart, as its does not
have a HDMI connection. also i have my xbox and ps3 connected via HDMI.
Any helpful advise will be appreciated