When power in set show std by mode when we on the set tv goes off condition (blue light on andgoes off
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@nvk25146 could be a power board or a mainboard issue. You need to measure the voltages from the power board teo the mainboard as well as the control voltages from the main board. Remove the back cover from your TV and post some pictures of all of the boards (clear and large pictures). That way we can see what you see and hopefully guide you further. We also need to know the exact model of your TV Adding images to an existing question
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