Tv won't turn on and no standby light

I have a Sharp LC-70LE660U tv will not turn on at all and there is no standby light checked the power board looked good and even bought a new power board and still nuthing?? Could it be the main board??

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yes it could be but usually you would still get a standby light. Also, do not rule out the LED board. Check the voltages from your power board to the main board and see if they correspond with what they should be. Post some pictures of all of your boards with your question. That way we can see what you see. Use this guide Adding images to an existing question for that

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