Question about HP Pavilion dv6000z Notebook

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Hp pavilion ze5500 display monitor still doesn't work

Hi.
There was no image in the laptop display, but I could see everything in an external monitor bright and clear. Windows was working good too.
So I figure that the problem wasn't the laptop video card, but the LCD.
So I change it for another hp pavilion ze5500 display in stock. But no image. Try setting the brigness with fn + f1/f2 but nothing at all.
I said: "Ok, this other LCD is also bad, I'll have to buy a new one".
So went to ebay and buy a used hp pavilion ze5500 LCD display for $78.
I instaled everything correctly: ground cable; antena cables on the two sides; the power cable; and turn on the laptop. Still no image in the laptop LCD, still everything works fine in a external monitor.
Could the problem then be the video card? I tought that if you can see stuff clear in an external monitor the video card is ok.
Is the LCD I bought from ebay is also defective?
Don't know what to do next. Please help. I'll apreciate your answer.
Thanks.
God bless

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  • 3 more comments 
  • EdPC Feb 02, 2009

    I see. Thanks.

    Is there a way I can fix this without the need to buy a motherboard?

    Thank you very much.

  • EdPC Feb 02, 2009

    Hi, eifion_edwar.

    The screen is permenantly blank right from the get go.

  • EdPC Feb 16, 2009

    Hi again.

    Well I change the Motherboard and it works fine. So, I guess it was the function key circuitry on the motherboard that controled the back lighting levels on the LCD as stated by Geekman.

    But I'm wondering. Is there a way you can target this problem without the need to test/buy a new LCD or a new MOBO? Cause I think the first thing that comes to mind is that the MOBO video card is ok and that the first choice is to test or buy an LCD.

    Can you identify the problem with the same laptop or you'll always need replacment parts?

    Can I change those function key chips so I can fix the old MOBO?

    Thanks a lot

    God bless

  • EdPC Feb 18, 2009

    Yeah, I see. Thanks

  • Eifion Edwards May 11, 2010

    Does the screen go blank when you log on? or is it permenantly blank?

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  • HP Master
  • 32,281 Answers

IT could be a motherboard problem with the function key that controls the switching of the video infomation between the LCD screen and the external video connector.
It could be the function key circuitry on the motherboard that controls the back lighting levels on the LCD.

Posted on Feb 01, 2009

  • Chris Hingee
    Chris Hingee Feb 02, 2009

    You could try to reseat the connectors on the motherboard that connect the LCD screen, that is your only hope, but I think it is a motherboard problem.

    The cheapest option is to use an external monitor with the laptop.

  • Chris Hingee
    Chris Hingee Feb 17, 2009

    Usually you need to change parts and or motherboard to solve the problems. To identify and to purchase the SMD chips is difficult and if you could purchase the chip, you need special gear to remove the defective chip and to solder the new chip. You will find the repair shops just replace the defective motherboard and components, it is the most cost effective method and least time consuming.

    In some cases it is better to buy a new computer and use the old components such as the hard disk, insert it into an USB drive enclosure and use it as an external hard drive for backups etc.

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