Bought PW6 couple weeks ago and occasional I notice a breakdown of the picture on sky. This only appears on moving parts of picture. I have the sky connected via Thor Scart cable to JS RGB Converter box which connects via 6m VDC VGA Cable. Also, sonmetimes have problem when scrolling through sky channels that the screen goes black. When I press sky services the picture returns Any ideas from Forum members before I contact AV-Sales ?