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I have a RCA L32WD14.... when you turn set on, the backlight comes on for a couple of seconds, green led is on, then set goes back off and a red led is illuminated. All of this occurs in a couple of seconds. Can you give me the most likely cause of this. Thanks Jeff

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  • jffryjrdn Apr 22, 2010

    Thank you..... on the set ,all you will see is the backlight come on for a couple of seconds, it may have sound or a picture if it were to stay on longer but it goes back off very quickly so the momentary backlight is all you see. Jeff

  • jffryjrdn Apr 22, 2010

    Thank you ... this set does have a separate inverter board . Jeff

  • jffryjrdn Apr 22, 2010

    Thanks.... I do have a dvm Jeff

  • jffryjrdn Apr 22, 2010

    Thank you.. So i compare the 24 volts going into ballast board from power supply TO say, the voltage that feeds the lamps ,and then, determine which is lost first. I this correct? Jeff

  • jffryjrdn Apr 22, 2010

    Thanks very much. You have been very helpful but it will be tomorrow before i can get this information. I would like very much to continue then if we can... if not thank you anyway.... I got started on this a little too late today. Jeff

  • jffryjrdn Apr 22, 2010

    Thanks....EST same as yours...i'll have those measurements tommorow . I'll check with you around 4 ...Jeff

  • jffryjrdn Apr 23, 2010

    Thanks for helping.... I checked the voltage.... here is what the set does set comes on with green led & 24 volts & backlight on ,then in about 1 second backlight goes off , 24 volts still there,then in about 2 more seconds the red led comes on , then, in about 2 more seconds the 24 volts drops to zero .....Jeff

  • jffryjrdn Apr 25, 2010

    Thanks for your help...sorry it took so long getting back to you . Jeff

  • jffryjrdn Apr 25, 2010

    No i did not have a time to check that , but i did get to check the 24 volts.... the voltage is there "before" you press the power button to turn set on. It will be monday before i can check the t-con board. What will it indicate if the voltage does not drop with this board unplugged? Jeff

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Hi jeff
I`m going to help you with your tv but first i`d like to know;
Apart from the backlight coming on , do you have picture and sound while it is on?

Posted on Apr 22, 2010

  • 8 more comments 
  • Jacques Marin
    Jacques Marin Apr 22, 2010

    O.k did you open the back of the set ?


    I`m asking because there is two circuits that cause that problem beside the main board and that is the power supply and the backlight inverter board.


    In some models the p.supply and inverter are on the same board.


    So i`d like you to take a look and tell me the layout of your set.





  • Jacques Marin
    Jacques Marin Apr 22, 2010

    O.k the next question is do you have a multimeter ?


    I`m asking because the next step would be to take some voltage measurement.

  • Jacques Marin
    Jacques Marin Apr 22, 2010

    O.k so there should be some 24 volts going to the inverter board.


    What i`d like you to do is check if that voltage drops in the power supply before the inverter goes off.


    The idea is to find which board shuts off first.


    Those voltage are usually indicated near the output connectors of the power supply.

  • Jacques Marin
    Jacques Marin Apr 22, 2010

    What i`d like to find is ;


    If that 24 volts drops when the inverter board goes off.


    Or is there all along, even when the set is off.

  • Jacques Marin
    Jacques Marin Apr 22, 2010

    No problem jeff


    Should be back online at about 4:00 pm EST


    What is your timezone?

  • Jacques Marin
    Jacques Marin Apr 22, 2010

    o.k talk to you then.

  • Jacques Marin
    Jacques Marin Apr 23, 2010

    O.k then is the 24volts present on standby(no power switch activated) ?

  • Jacques Marin
    Jacques Marin Apr 23, 2010

    Also ; In the upper middle part of the lcd panel there is a small board(usually under a shield) called the lcd controller or t-con.


    I`d like you to pull the plug off (the one coming from the main board) to see if it makes a difference.

  • Jacques Marin
    Jacques Marin Apr 25, 2010

    Hi jeff, welcome back


    Did you try the t-con board ?

  • Jacques Marin
    Jacques Marin Apr 25, 2010

    What i want to find is;


    If the backlight stays on when the t-con is unplugged as the main board may switch it off when it detects a fault with the t-con.

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