@devsharma59131 that is a little known TV and of course schematics etc. are not available. WE would need to see your boards. Remove the back cover from your TV and take a look at all the boards. Check for obviously damaged components. Like blackened,charred or missing components. Post some good pictures of each board as well as one of the complete layout, so we can see what you see.
Since the red power LED light is on, that would mean your power board supplies the standby voltage. It could be an issue with the main board not "telling" the power board to turn on. For that you would have to measure the voltages on the connector from the power board to the main board cable.
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