@francisdarkoh you are saying the screen turns off. This could actually be your backlight. Darken the room, turn your TV on and once the screen is dark, use a flashlight and shine that at an angle against the screen. If you can now make out your picture, you know it is your backlight strips that have failed. Those can most likely be replaced.
If you can not, its time to unplug your tv, remove the back cover and to take a look at the boards. Check for any damaged (burned or otherwise damaged) components. Post some pictures of your boards with your question. [guide|21499]