Samsung smart TV. We had to use it with an external receiver so we set the TV on video input. It works. We turn off the TV, turn it on again, it shows the video

Samsung smart TV. We had to use it with an external receiver so we set the TV on video input. It works. We turn off the TV, turn it on again, it shows the video input for a brief moment and then hides it with a message that there is no signal and please choose you signal input. No matter what we did, it didn't want to just work. The solution? connect the TV to internet (in a rural area), wait overnight so it can download the Terms and Conditions without any indication that this is what it is trying to do, sign the T&C and then it works...