I got my replacement Samsung SP46L6HX and everything seems fine apart from when I'm trying to use RGB. I don't know whether it's because it's a bigger screen and that's showing the flaws in the picture, but my PS2 and DVD player don't look like they're running in RGB. I've got an RGB switch box that has a button on it that disables RGB and when I pressed that on my previous TV you could instantly switch between Composite and RGB. When I try that today I notice no change when I press the button. I've tried it in all 3 Scart sockets in the TV, connecting direct without the switch box, but they all seem to look the same. Is there a setting on the TV that I have to turn on for RGB? Or am I going to have to get another replacement?