Chosen Solution

My vizio TV shuts off when I power it on ,before it happened the screen was darker than it was ,I was still able to see what I was watching but the screen was dark ,then my TV shut off ,when I tried to cut it back on it shut back off I kept trying to cut it on but it shut off everytime ,so what should I do?

@davd could be power board issue. for more information we would need to know what model vizio this is. You want to remove the back cover and check the capacitors on the power board. Check for domed looking, leaking or other wise damaged caps. Post some images of the board with your question. For that use this guide.It will allow us to see what you see.