Thanks for your message. But just so you know: if you want Samsung support, I support US products and customers. And from what I can tell, this model is for Australia. (Correct me if I'm wrong.) So while I can't help you directly, if you want Samsung help, here's the Samsung Australia portal for support on that product: http://www.samsung.com/au/support/model/UA40D6400UMXXY
Hope this helps you!
Hi. I've recently made a factory reset on my UA40D6400 Samsung Smart TV. But I now see that the Network menu is grayed out so that I cannot select it and the TV has become very unresponsive to remote commands. It's become very slow. What would you advise?