I have a Samsung model AU8000 Smart TV, bought less than 2 years ago, and I need some advice.

I'm getting a message "Smart hub is being updated. Please try again later" and the TV keeps cycling on and off. The screen fades a bit, then at the top an uneven black line appears then "spills" down the rest of the screen like spilled black paint. Then the screen goes black and 10 seconds later the TV comes back on. Within 2 minutes the same thing happens.

I've tried every fix I could find on the internet: doing a factory reset on the TV, resetting the smart hub, resetting the firm ware, checking the network connection, unplugging the the TV and letting it sit for a while. Nothing works.

I did find that letting the TV sit unplugged for a few hours it will go on be work ok for about a half hour, but then it goes through the cycle I described above.

Any idea on what to do? Is the TV toast?