A:AnswerThis TV has a Sling TV app available. As I don't have Sling TV I am not sure if the app will stream from your Slingbox but as long as you have a sign in to Sling it may work. You may be able to contact them to ask.
A:AnswerI had this issue. Once you establish your WiFi connection Go to Settings / Network / WiFi Connection / Advanced WiFi Settings / IPv6 On - Off. Turn this On and your TV will save your Internet Network Settings forevermore!