Toshiba Tecra cdt 550 LCD is DARK. HELP
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Thread: Toshiba Tecra cdt 550 LCD is DARK. HELP

  1. February 15th, 2005, 07:15 PM #1
    amexjoe
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    Question Toshiba Tecra cdt 550 LCD is DARK. HELP

    I am working on a Toshiba with a dark LCD. Several users pointed to the FL inverter as the most likely problem. So I replaced it. LCD is still dark. There is no voltage at any time at the contacts going to the lamp. I am monitoring the voltage from the time I power up the unit and continue to monitor while switching from the LCD to an external monitor.
    I am thinking that there is no voltage going to the FL inverter from the mobo.
    So, I need a little help probing the contacts that come from the mobo to the FL inverter. Any and all suggestions greatly appriciated.
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  2. February 15th, 2005, 08:30 PM #2
    Damned Angel
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    does it work displaying to a desktop monitor?
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  3. February 15th, 2005, 10:19 PM #3
    amexjoe
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    works fine to a monitor and I can see the image in the lcd panel but the lamp does not lite.
    there is no power on any pins @cn1 connector when on the battery pack.
    there is power on pins 5 and 7 when the ac adapter is plugged into the notebook. (5.04vdc)
    does anyone know what voltage should be present @cn1?
    Last edited by amexjoe; February 16th, 2005 at 10:31 AM.
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