Samsung UE55D8000 screen issue

This is how my Samsung UE55D8000 Smart TV looks since last holiday. For those who may not know it, this was the best 2010 Smart TV, and had a price of 2600€, but as you can see, it had not last more than 6 years. If my TV was designed to die in 6 years, then I won't buy any Samsung LCD o LED TV again, despite the 10bit HDR or quantum dot technology. I don't know why is this happening, but other people with the same problem I found on forums, were told to better replace the TV. Sadly amazing. If anyone had this same issue and was able to get a solution, please share it in the comments.