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PN50C490B3D No power

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    PN50C490B3D No power

    Hello everyone.

    I need from you help with this plasma tv.
    I bought this tv couple days ago and the symptoms was turn on and off couple times until stop.
    Everything looks good on power supply (capacitors, nothing looks like burning)
    My first step was check the standby voltage and I get 5.12volts. After this I noticed that I don't have enough voltage on ps-on. .168volts.
    So, I proceed to disconnect the xmain board and realize the tv stop turn on and off several times.
    I proceed to replace xmain board and now, I still have standby voltage, no voltage on ps-on and the logical control board no turn on that green light.

    I did the process turn on without main board but the tv doesn't turn on
    I'm really stuck on this.
    Any Ideas???
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