Why does my TV keep shutting itself off?

Elisa Sanchez, do you get any blinking from the front LED's? If so, let us know what it is . If not then it is possible that you are having bad caps on the main power board. if you press MENU, or Input on the TV, do these indicators show up on screen? Are the fans running normal? Besides the model number of your TV if will help tremendously if you can give us the chassis number. It should be on a sticker on the back. After removing the back, post some images of the component layout with your question