-> http://tinyurl.com/p7jnxgs

This failure is seen across many makers if not all. I can not help you diagnose your TV. For that you use your training in TV repair since these are LETHAL VOLTAGES INSIDE. You'll have your service manual and test gear to follow the troubleshooting in the service manual.

Sometimes folk dive into TV repair without the tools or background. Some understand they are out of their depth, others explode because there is no way for any tech to tell them what exactly to replace.

These are not user serviceable.