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Laptop is HP zd8639ea 17" screen. A thin vertical line of very small flashing dots has appeared in the centre of the screen. How to get rid or is it replacement screen time?

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  • Dave1011 Apr 03, 2008

    Many thanks for your prompt response. I have already connected the laptop to external monitor and the fault line does not appear. How do I test the video, or is that a daft question?



    Confirmed, the fault line is there from start of boot up.

  • Anonymous Mar 15, 2014

    a bar has appeared along the bottom of the screen about half an inch high, made up of thin coloured vertical lines

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Hello Dave 1011

There's a (very) slim chance it's a cable issue. More than likely, however, it is, as you suspect, the monitor.

If you're handy w/ tools and such, you can replace the monitor yourself. It'll cost at least $225US so, shop around for a good deal. (Aside from the motherboard, the monitor is the most expensive part of your laptop.)

You can run a test of your video to confirm the problem. However, when the issue is localized on the screen like that, that's a red flag that your problem is hardware.

For now, you can connect an external monitor to your laptop. In fact, that's the best way to pin down the problem to the monitor (or cables connecting to the monitor). Do this before shelling out the bucks for a new or refurbished monitor.
If the problem persists while using an external monitor, then, the problem is still likely to be a hardware issue - but it isn't your monitor. The issue is in your video circuitry. Now you're talking about a new motherboard.

I also recommend you find the product service manual for your laptop and follow the steps for disconnecting the monitor from the laptop. Then, reconnect it. See if there are any changes in the symptoms. If you need help w/ this, just let us know.

Please, let us know if this was helpful for your or, of course, if you have any further questions.


Thank you
BJ

Posted on Apr 03, 2008

  • 1 more comment 
  • B Joan Rapier
    B Joan Rapier Apr 03, 2008

    A few quick questions:

    (01) Does the screen appear normal during POST? (While the computer is booting up?)

    (02) In other words, can you see text across the entire screen during boot up?

    (03) Does the problem only appear once you have booted into your operating system?

    Still, if you connect an external monitor and the problem does not show up on that external monitor, then we're back at the issue being your laptop monitor (or wiring to the monitor).


  • B Joan Rapier
    B Joan Rapier Apr 03, 2008

    Hi Dave1011

    First off, there's no such thing as a "daft" question. :)

    2ndly, if the problem does not appear on the external monitor then you've pinned the problem down to the monitor. There's no need really to test the integrated video circuitry of your motherboard. If the video is OK on the external monitor, then you've confirmed that the motherboard's video circuitry is working just fine.

    Much of trouble-shooting computers is done by process of elimination. You've used this method already to diagnose your video issue.

    What I'd do is get 'hold of the laptop's service manual and disconnect then reconnect the monitor using the instructions you find there. I'd be very surprised if the problem wasn't in the monitor itself but, since you're going to have to disconnect it anyway in order to replace it, you may as well give this a shot. "Reseating" (unplugging then plugging back in) cables and other devices is often a remedy for hardware related issues.

    BJ

  • B Joan Rapier
    B Joan Rapier Apr 16, 2008

    Hello Dave1011



    Hopefully you have been able to have your laptop monitor replaced or repaired by now.



    Since the information I provided you with enabled you to diagnose the problem you were experiencing (lines appearing on the display), would you, kindly, take just a moment to re-rate my solution and change it to a "FixYa"? I would be most grateful if you wouldn't mind. :)

    Thank you kindly!
    BJ @:)

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