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    HP DV2700 Display problem

    Discussion in 'HP' started by vols_xx, Jun 10, 2010.

  1. vols_xx

    vols_xx Notebook Enthusiast

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    Hi,

    I have a friend's HP DV2700 series laptop here with a display problem. The LCD works fine, as the VGA output too. But it seems that the backlight does not work. (I can see the display while having a flashlight pointed at it)

    I know that it may be the backlight itself or the inverter... But I was wondering how can I diagnose where is the problem exactly as I don't want to buy parts that I don't need.

    Any input appreciated!
     
    vols_xx, Jun 10, 2010
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  2. Daytonairoc

    Daytonairoc Notebook Enthusiast

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    unless you have a spare invertor its hard to tell. you can check the voltage coming out to the blacklight. if theres none then its the invertor

    my guess is its the backlight as ive had a bunch of dv2000 and the back lights were all dead. but go with the easiest to replace first(the invertor)
     
    Daytonairoc, Jun 11, 2010
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  3. vols_xx

    vols_xx Notebook Enthusiast

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    Thanks for the help.

    If it's the backlight, that means I have to change the display panel completely right?
     
    vols_xx, Jun 12, 2010
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  4. 2.0

    2.0 Former NBR Macro-Mod®

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    That is correct. Unless you are really good with disassembling the panel to replace the CCFL lamp. It's delicate work.
     
    2.0, Jun 12, 2010
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  5. brianstretch

    brianstretch Notebook Virtuoso

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    More likely it's a stuck lid switch. That's very common on the dv2000 series. There's a great walkthrough on how to disconnect the switch in this forum.
     
    brianstretch, Jun 13, 2010
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  6. darkprime

    darkprime Notebook Consultant

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    I suggest you unplug the lid switch first. If that doesn't do it, then replace the inverter. If that doesn't do it, think long and hard about going the cheap(er) route with a new backlight, or just buy a new display.
     
    darkprime, Jun 13, 2010
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  7. vols_xx

    vols_xx Notebook Enthusiast

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    Thanks everybody.

    Could someone point me out to the lid switch assembly guide on the forum? Either I am blind or I cannot find it.
     
    vols_xx, Jun 15, 2010
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  8. brianstretch

    brianstretch Notebook Virtuoso

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    brianstretch, Jun 15, 2010
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  9. vols_xx

    vols_xx Notebook Enthusiast

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    I did the fix and unplugged the switch wires and nothing. I ordered an inverter and we'll se by then.
     
    vols_xx, Jun 22, 2010
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  10. vols_xx

    vols_xx Notebook Enthusiast

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    Just installed the inverter with no luck. Nothing has changed.

    This means I need a new display?
     
    vols_xx, Jun 30, 2010
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  11. vols_xx

    vols_xx Notebook Enthusiast

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    My friend just told me that his screen worked at some point 1 or 2 days after it originally failed, I don't know if this can help me diagnose the problem.

    Can a broken screen/backlight can sometimes work rarely in a random fashion?
     
    vols_xx, Jun 30, 2010
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  12. brianstretch

    brianstretch Notebook Virtuoso

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    A failing backlight can draw enough additional power to fry an inverter. Usually that's not the case, but it's possible. I ran across one notebook where one of the wires connected to the CCFL had broken off and was making intermittent contact. Most likely you need a new backlight or whole new panel. Backlights are tricky to replace and require soldering. I'd seriously think about selling the notebook as broken on eBay and rolling the money into a new machine, especially given HP's recent model refresh, in large part because broken screens have given me more grief than anything other than defective NVIDIA chips.
     
    brianstretch, Jun 30, 2010
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  13. vols_xx

    vols_xx Notebook Enthusiast

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    So I guess it's time to order a new LCD screen?
     
    vols_xx, Jul 1, 2010
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  14. brianstretch

    brianstretch Notebook Virtuoso

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    Yup.

    If that dv2700 has a NVIDIA GPU I wouldn't put any more money into it. Sooner or later that chip is going to fail.
     
    brianstretch, Jul 2, 2010
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