Samsung's policy is that on 32 inch and under it's a bring it in unit.
Did they at least check the firmware version and update it if there was newer?
Did you try a factory reset? And after the factory reset NEVER install any apps? Use it as-is?
There have been many times I have turned on my Samsung 32" Smart TV and either or both sound and picture may not come on. If I turn it off and pull the plug and turn it back on the TV usually works. I installed this TV on 7-23-2018 and the TV is still under warranty. I have contacted Samsung support 4 different times and requested a new on the 4th support call. I was told I had to bring it in for repair which is 80 miles away. Is there a solution to my problem or who should I contact at Samsung to get this TV replaced.