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Done every everything power cord and 10sec rule and no change tv won’t turn on please could you help

tuiholland34  remove the back cover and check the power board with a multimeter. See that you have power going to the board. Check the fuses on the board for continuity. Next check the connector supplying the main board. The values will be printed on the board right next to the connector. Check those. From the little bit of information you have given us this is really all the help we can provide you with for nwow