I have an entry camera, the type that can be bought at any electronics or DIY store. It connects to a TV scart socket. No problem with that. But die to digital switchover, thought I would use an additional switched scart socket I have and know works on another set with DVD etc. I have plugged the camera into the scart and all OK but if I plug the extension scart into the TV and the camera into the extension, I get nothing. Anybody help please?