One connect box compatibility

[Ttft]

So I got a secondhand tv from a friend bc it had a line in the picture. I got that fixed but I can’t find a one connect box that’s compatible. I don’t wanna spend the money on a box that doesn’t work my model number is : UN55KS800DF

[PaulyWauly36]

did the tv have a 1 connect before u got it?,