Question about HP Compaq Presario F750US

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Laptop screen shows balck & white grids only- no images nx 6110

I have a nx 6110 laptop. The screen of the laptop has suddenly stopped display. It only shows black & white grids. There is no problem in the boot though.

Can someone suggest a remedy.

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  • vishal_sriva May 26, 2009

    The problem is from start of the laptop- when I say booting- I guess it is booting from the sound it makes when the system is up and running.

  • Quirino Cardozo
    Quirino Cardozo May 11, 2010

    Vishal, what do you mean when you say no problem in boot? Does it boot the POST section and then start giving problems? Please describe in a little more detail to assist in solving your problem.

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Hello,

I have had this same problem with a HP DV2000 and the problem is not the contrast light. What it is, is that the laptop thinks that the screen is been shut down that is why the light does not come on. The best way to solve this is to remove your keyboard first.

You can remove the keyboard by removing exactly 7 screws from your laptop back, there are 5 screws located under your battery and other two that are in the location of your RAM'S.

Just open them up and then you will notice that the key board pops out abit then just simply take it up and then just below the keyboard, on the same line where HP brand logo is on your machine there are two small clip types of pind, that you can remove and put back.
There is a clip that is hidden abit under the metal plate, so just try and remove that clip from its place using a needle or any long and thin object.

That will make the laptop not have the problem. But once you remove that the laptop constantly will think that the screen is open even if you close it. then after like a week or two you can put it back and all shall be fine if not then just remove it and keep it out.

You can then set your power options to shut down the screen light every 2 minutes or something like that so as to avoid the backlight being switched on all the time.

Hope this solves your problem.

Posted on May 26, 2009

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When i power on the laptop nx 6110 it brings a white screen on the LCD.


What can you do if the laptop LCD screen turned completely white? From my experience I can tell that this problem may be related to the following:
1. Loose connection between the video cable and the LCD screen.
2. Defective LCD screen.
3. Defective motherboard (I assume the graphics card is integrated into the motherboard).
1-laptop-white-screen.jpg Here's an example of a laptop with white screen. When you turn on the laptop, it starts but the image on the screen is completely white right from the beginning. In my case it was a Toshiba Satellite M45 laptop but this problem may occur with any other brand.

2-external-video-works.jpg
Most likely you still can use the laptop with an external monitor. Just connect the monitor to the VGA port on the back or side of your laptop and then switch the video output from internal to external mode.
On Toshiba laptops you can toggle between internal and external screens using Fn+F5 keys. Hold down Fn and press on F5 until you get video on the external monitor.
On IBM laptops use Fn+F7.
On HP laptops use Fn+F4.
It's possible that you have to use a different key combination on your laptop but you get the idea.
On some laptops, in order to be able to use the external monitor, you have to connect it to the laptop and then restart the laptop so the external monitor is detected by the laptop.
3-video-cable.jpg I noticed that in some cases the laptop screen may turn white because of poor connection between the video cable and the LCD screen. If you want to check this connection, you'll have to take apart the display panel because the connector is located on the back side of the LCD screen.
These laptop service manuals and disassembly instructions may be useful.
4-reconnect-video-cable.jpg I always check the video cable connection first. Reconnecting the video cable may fix your problem.
If reconnecting the video cable doesn't help, most likely you have a problem either with the LCD screen or with the motherboard.
5-disconnect-lcd-screen.jpg The best way to find out witch one is causing the problem is testing the laptop with another working LCD screen. Without this test you'll have to guess because as I mentioned before this could either bad motherboard or bad LCD screen.
You'll have to disconnect the video cable from the LCD screen (connector 2) and the inverter board (connectors 3 and 1). After that you connect another working screen and test video.
6-test-with-another-lcd-screen.jpg For this purpose I'm using one of my test LCD screens. My test screen is cracked and because of that you see a wide white band in the center but it still works fine for this test.
The original screen is white but my test screen works normal (except the crack of course) and I can see the image. After this test I can tell that the problem must be related to the screen.
7-white-lcd.jpg After I assembled everything back together and connected the original LCD, it's still white.
CONCLUSION. In my case this problem is related to the LCD screen and it has to be replaced.



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1 Answer

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Power drain would be a better solution in this case.
1.first shut down the comp
2.unplug the charger
3. remove the battery
and after press and hold the power button for 60 seconds without any charger and the battery.After the 60 seconds replug the battery and the charger and turn the computer

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To recover all your data is easy - just remove the hard disk from the laptop, put it in a case like one of these
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010010092%201053807124%201054107131&name=SATA
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1 Answer

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This could be an issue with the inverter problem. Are you using a universal adapter? If so, this could be the possible reason why the inverter died. It is not supplying the correct input for the inverter, thus the damage.

Please consider to bring this to an authorized HP service center. If its still under warranty, the better.

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