TV screen turns on but is black

Hello, my LG TV 43LJ500V that I bought for €330 and that has not been under warranty for 2 months has had a major issue. Everything was fine, and then one day, when I turned on my TV, the screen lights up but the image appears black. I don't even know if the problem comes from the panel or the motherboard. Has anyone else experienced the same problem and knows what the issue might be? Thanks in advance


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