Friend, keep in mind that you can break the display, but if you decide to follow the recommendation of dni20, see 5 or 6 videos of how the procedure is done, in the end with a little patience it is done, it is not difficult, always take care of the flex of the display that if they break there is no remedy. To be sure that the LEDs turn on the TV and press for example the menu key, and with a flashlight see if you see the letters or any image, if so, the defect is usually the LEDs, and the rest is left to decision hers. Greetings and luck