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laptop screen constantly dimming?

Hi my laptop screen has constantly been dimming. During darker pages or certain pages my screen brightness will start dimming for no reason. Even without anything open or anything. When i go to a page thats like really bright like facebook you can see my screen start getting brighter and brighter to its back to full brightness. I have no idea why cause i have my computer on high performance setting with no power saver options on. It does it on battery or plugged in. I have no idea what to do. I have a Acer Aspire 7745-7949 and am running windows 7 64 bit. The screen is a LED and the laptop is only about a year and a half old.

3 Answers

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  • Anonymous
    9 years ago
    Favorite Answer

    Connect your Acer Aspire 7745-7949 laptop VGA port to an external LCD monitor screen to see if your laptop backlight is defective.

    As a last resort you might need to fdisk, reformat your Acer Aspire 7745-7949 laptop hard disk clean and reinstall OS. Before going that route, try following simple fixes to see if the problem goes away.

    Remove the battery and charger/ac adapter/power cord from your Acer Aspire 7745-7949 laptop, press and hold the power button for 20 seconds to discharge any residual current inside the laptop. This clears your RAM and is like a hardware reset. Replace the battery and charger/ac adapter/power cord and turn your laptop on.

    Boot in "safe mode". As it starts up press F8, the computer ask you if you'd like to start in safe mode. Highlight "safe mode" and press enter. See if your Acer Aspire 7745-7949 laptop works normal.

    If it runs normal now, do the following maintenance and tune up,

    Uninstall unnecessary programs and applications.

    Scan with a antivirus program

    Scan with a spyware/malware program

    DEFRAG C:

    CHKDSK C:

    Clean up and repair registry problems.

    Use external harddrive for all your future downloads.

    If the problem persists, did you check if it could be your Acer Aspire 7745-7949 laptop power cord or power source problem? Insufficient power might cause error messages that are misleading. Take the battery out and power on your laptop with the charger only. Make sure your laptop power jack and charger plug tip are securely connected. Did you notice the power jack loose? You can find laptop power jack on ebay. Fixing and soldering the power jack requires professional skill though. The charger green/blue LED should be on. If not, replace the defective charger. Acer Aspire 7745-7949 laptop charger has its own limited lifespan and does not last forever, consider buying a lifetime warranty charger online from company like topmic.com

  • 9 years ago

    you should start planning on getting a new one

  • 9 years ago

    Buy a new one ..

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