Hello, I reset my tv to factory settings with the remote and now it is stuck there (for two weeks). I have literally tried everything. I even bought a brand new remote from Samsung Parts for $97.00 and still doesn't connect to the TV.
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That means (words skipped) the remote is either not paired, communicating with, being used correctly, or the TV UI is frozen or not working.
Something involving the remote is the likeliest reason but all things are possible.
Try the remote movement button up close to the receiving sensor on the TV.
If that still fails then try pairing the remote. Looks like it should be with simply pressing the back and play/pause buttons at the same time. That would hopefully cause the TV UI to change but it might not.
Otherwise, try various buttons on the remote including the input button and see if the movement buttons work at some point.
Otherwise, it probably either needs the hidden service menu or to be serviced by a shop that services those TVs as they have specialized ways to deal with the TV.
I have nothing more specific to help you with. But, that's about all there is to be done really.