Laptop shows no dislay, external VGA port displays OS

Posted on 2009-04-29
Last Modified: 2013-11-17
I have an HP DV6000 that I just replaced the LCD screen, invertor, and the power cord for the screen from motherboard to LCD & invertor. I have no display on the LCD screen. I cannot figure out why it will not display as it does display just fine on the VGA output.

I was able to test the LCD screen in another laptop I have, but I can't test the invertor as it's got a different connection. I sent back the invertor and got a replacement one, so I highly doubt it's the invertor.

Any suggestions what this could be? I hope it's not the mobo, as the VGA still displays the OS loading, just a black LCD screen (no visible image at all, or screen flash when powering on or on)
Question by:Stangman66
    LVL 27

    Accepted Solution

    I believe that you have ruled out the LCD and the invertor. My guess is that the VGA connection is using a different port/path than the laptop onboard video. If that is truly the case, you have narrowed it down to the motherboard I would think. The only other thing that comes to mind is that somehow you may have missed a seating or cabling connection for the LCD on the laptop.

    Author Comment

    Double checked all the seating/cable connections and they are good. . This means the video card is good?

    Just the motherboard connection running from the video card to the LCD power connector ?  If so, is this fixable?
    LVL 7

    Assisted Solution


    I think you need to check the settings of the graphic card. sometimes you have a combinaison key with Fn + F5 or another Fx key to tell the card sending output on both LCD and vga displays.
    perhaps the resolution is not good for lcd display, check first by setting vga on both and tell us.
    LVL 69

    Assisted Solution

    The video card is good, if you can see it on an external display.  Since you have replaced the screen and inverter and checked the cables, that leaves the LCD controller, which unfortunately is probably mounted on the motherboard.  For example,

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