barold:
I have the SMCD3GN which may or may not be the same one as yours. I have all 4 ports connected to different devices, including a Samsung Smart TV and have no problems with any of them. I've never changed any of its settings and I don't use bridged mode. I'm wondering if there's an option for your TV that's not set up properly. Sometimes they can be a little confusing, especially with network settings.