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LCD Monitor does not turn on

Discussion in 'Electronic Repair' started by Tim, Sep 6, 2004.

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  1. Tim

    Tim Guest

    I have a 15" LCD monitor that does not turn on anymore. It's a Tatung PD-40
    and has been in use for about 2 years. It has an external 12V power supply
    which works ok. The monitor itself does not come on, and the power LED also
    does not light up when pressing the POWER-ON button.

    What should I be looking for? What has to be replaced? It's not the
    backlight, as the LCD does not come on at all. I was thinking it could be
    the INVERTER, but how do I find out for sure.

    Any help would be appreciated.
  2. Andy Cuffe

    Andy Cuffe Guest

    I would start by checking any fuses. I've seen a few LCDs where one
    blew for no apparent reason.
    Andy Cuffe
  3. John Gill

    John Gill Guest

    The inverter usually puts out high-voltage AC to drive the backlight.
    I have used a small NE-2 bulb taped to a popcicle stick to detect
    if this voltage is present. Just hold it near the small transformer(s)
    on the inverter board. The gas in it will glow if a high-voltage
    AC source is nearby.
    Hope this helps....
  4. The 12 volt external power supply may be at fault.
    Robbie McFerren
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