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toshiba satellite a40 laptop-LCD SCREEN

Discussion in 'Hardware' started by jazzmaster44, Oct 7, 2009.

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  1. jazzmaster44

    jazzmaster44 Thread Starter

    Jun 10, 2003
    The lcd screen backlight work fine, but screen is reddish. When I connect the external monitor to the laptop the video is great. When I installed a another used lcd screen into laptop the is white, and no video. So, I ordered another video cable hoping that this will fix the problem. What could cause the lcd screen to be white? The external monitor work good with the laptop, I am not getting any video to the lcd screen. Could the video on the motherboard be bad?

  2. DeputyDogg


    Aug 19, 2009
    I don't think you have a bad video card if the image on the external monitor is fine. It sounds like its either the video cable or the backlight inverter. If the original lcd screen is bright enough and clear enough (except for the reddish tint) then I'd suggest trying the new video cable with the old screen. If you still get a reddish tint then I'd recommend replacing the backlight inverter (if you can - not all laptops allow this).

    The only reason I can think the new screen isn't working is due to no/out-of-date/incompatible drivers. Still, not sure why the screen would be white. Have you tried the screen with a different laptop?
  3. dlsayremn


    Feb 9, 2008
    If the external monitor is working is working the onboard video is OK.

    Try Fn + F5 keys. Sometimes they are use to toggle between laptop and external screens.

    Check the video cable connections to make sure they are seated properly.

    Reconnect the old screen to see if you still get a picture with it. If you do, then there is something wrong with the replacement screen.

    Saw DepuTyDogg repled while I was typing. Don't think it is the backlight inverter with the replacement screen. Screen would not be white if it was.

    Just had a thought for a possible work around with the old screen if it proves to be a problem with the new one.
    Graphics Properties, Color Correction.
    Select Red and decrease Brightness to get rid of the red tinge.
    You could also try increasing the Brightness for Blur and Green instead.
    Once you get something acceptable, click apply.
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