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Norwood Micro 19" LCD (L199) Backlight Problem

Discussion in 'Electronic Repair' started by Henry, Apr 15, 2007.

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  1. Henry

    Henry Guest

    I've got the above LCD that exhibits this problem:

    When you turn the unit on, both backlights operate and you get the standard
    "no signal" message on the LCD. After about 2 seconds, the backlight turns
    off, along with the power LED, while the video is still working (verified
    with alternate light source). After another two seconds, the backlight comes
    back on with the power LED, then we go through the same process ad
    infinitum.

    Upon inspection, one of the filter caps (poly film) was bulged, so I
    replaced with no joy. I have not found any schematics or referenceds to
    parts for this specific monitor.

    Does anyone have any ideas on where to start with the repairs on this
    monitor? Even better, what about sources for service manuals and parts for
    this one (hey, it never hurts to ask)?

    Thanks for your time!

    Henry
     
  2. Maybe the CCFL bulbs are failing, or since the power LED goes off also -
    maybe a problem with the portion of the power supply that powers the
    inverter.
     
  3. JANA

    JANA Guest

    Replace the backplane lamps and ballast supply.

    --

    JANA
    _____


    I've got the above LCD that exhibits this problem:

    When you turn the unit on, both backlights operate and you get the standard
    "no signal" message on the LCD. After about 2 seconds, the backlight turns
    off, along with the power LED, while the video is still working (verified
    with alternate light source). After another two seconds, the backlight comes
    back on with the power LED, then we go through the same process ad
    infinitum.

    Upon inspection, one of the filter caps (poly film) was bulged, so I
    replaced with no joy. I have not found any schematics or referenceds to
    parts for this specific monitor.

    Does anyone have any ideas on where to start with the repairs on this
    monitor? Even better, what about sources for service manuals and parts for
    this one (hey, it never hurts to ask)?

    Thanks for your time!

    Henry
     
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