Chosen Solution
Tv is on and randomly picture goes dark with no sound
@kred sounds like a bad IP board (power board) Remove the back off your TV after unplugging it, then check the power board for any leaky or domed looking capacitors. Repalce those. Once you open your TV’s back cover take lots of pictures and post those with your question. Use this guide for that, it will allow us to see what you see.