I am not sure what wrong with the connect box but the TV turns on and off after few minutes of playing and displays a connection cable screen. I have tried so many ways to reset the TV as well as unplug and plug back in the connect box but it still has the same issue. My TV serial is . I see many people here also posted the similar issue with their connect box. I bought the TV less than a year. This is my first smart TV with Samsung and it has this issue. I am very disappointed because it is an expensive TV.