I have a Sony KDE-P37XS1 and have a problem connecting my Sky digital box in RGB mode. When I switch from PAL to RGB output (in the setup menu) on the Sky box the picture is fine and appears to switch into RGB mode. However whenever I switch Scart control on from the setup menu the picture turns yellow?? If I turn off the Scart control the picture returns to normal? Does anyone know what is causing this? PS I am using a Cambridge Audi 21 pin Scart cable connected to the RGB input on the KDE-P37XSI (AV2).