Screen is very dim when using battery power

I have Inspiron 9100 notebook. The screen is very dim using battery power. Is this a backlight problem and if so is backlight built into the screen or is there a bulb to replace?

If the notebook screen is very dim only when it runs on the battery power, most likely this is not a hardware related issue. Check your notebook power settings in the control panel. It’s possible that your LCD screen brightness is set to minimum when the notebook runs on the battery power. Usually, you can adjust settings in the control panel, in the power management utility. You can change screen brightness for AC and battery modes separately. On some laptops you can change screen brightness settings in the BIOS setup menu.

Here’s an example of adjusting the LCD screen brightness on a Toshiba laptop. You can do it through Toshiba Power Saver utility in the control panel.
As you see, when the notebook runs on the battery power, you can you can adjust the screen brightness at a few different levels.
When the battery power goes down, the LCD screen gets darker.

Screen brightness

Different notebooks use different power management utilities, but the idea is the same.

25 Responses

  1. Geoff Cunningham

    I have a toshiba equium a60.

    When i close the screen down while still working the monitor fails to fire up again and I end up having to re boot it from the start. Is the some command that I need to do to get the screen working?

  2. Laptop Freak

    Geoff Cunningham,

    Is there some command that I need to do to get the screen working?

    No, it has to fire up by itself without any command.

  3. sophia

    hi i have a dell inspiron 6400, and i know a few poeople are haviong this problem, if mine was under warrenty i would have it reaplced without looking around, however it is not. my hindle has split. almost unpopped as u can see in this:

    http://www.flickr.com/photos/travisharder/2492565406/

    pls pls pls someone help

  4. Darien Carter

    Dear Laptop Freak,
    I would like to accolade you for troubleshooting my computer issues, but here’s a third issue.

    I finally got my Toshiba Tecra A2 repaired.One issues: There is something wronk with the back light.
    I have to smack the back of the monitor and move the monitor open and close a few times to resolve the issue.
    Help? Thanks!

    Darien

  5. Laptop Freak

    Darien Carter,

    There is something wronk with the back light. I have to smack the back of the monitor and move the monitor open and close a few times to resolve the issue.

    This could be connection related issue, it’s possible that the video cable is not making good contact with the LCD screen. In this case reseating the video cable may help to fix the problem. Did you get the laptop like that after repair? You should take the laptop back to the repair shop.

  6. I have a Toshiba laptop A215 and when I opened it up today the screen was black and the keyboard doesnt seem to be working (because the CAPS light wont go one when I press it). I’ve tryed turning it off for a while but I still have a black screen. Was working fine yesterday. This computer is not even a year old. Is this a commom problem with Toshiba?

  7. I have a Dell xps M1530. When running on battery power the screen is very dim. I did every possible display and power management setting with no luck. The brightness adjust on the keyboard has no function, I can see the bar moving as I try to adjust brightness setting but screen does not get brighter or darker. Please help.

  8. hey brandon…

    you have to just change the power option….change the brightness level in battery option..i have the same problem and it works fine now..

    good luck

  9. Brandon/Imran, I have same problem as Brandon (i have Dell XPS M1330). I have changed power options to high performance with no luck. I am able to increase/decrease brightness when my computer is plugged in, but I can’t do this when I’m running on battery. the screen is very dark and will not get brighter. Ideas?? (Tech guys at work even said I had to call DEll)

  10. Hello, I have a new Toshiba Satellite with Vista, and I have a slightly different question from these, but I couldn’t find a much better place to put it.

    I would like to decrease the brightness of my screen even more somehow to increase battery life. I have used the FN + F6 to decrease it to 0%, but many of my friends’ laptops have much dimmer screens that increase their battery lives. it’s not that it’s not getting dim, it is much dimmer than 100%, but I was wondering if there was some manual way that I could make it dimmer? Any help would be great. Thank you.

  11. Hello,

    Well, my problem is a bit weird and I don’t know what to do about it. Don’t know if it’s a screen problem, the configuration that some how got messed up, or it’s the battery.

    I know that my battery doesn’t work that well, so most of the time I’m charging it and meanwhile working with the laptop. Never had a problem with this.

    But since today, when I got the battery cable and put it in the laptop, at once the screen went like dull, dim, darker, grey, whatsoever. But when I remove the cable, the screen goes back to normal, a perfect white.

    What’s wrong?

    The strange thing aswell is, that yesterday night my touchpad didn’t work nor today, so what I did was to restaure the computer, and bingo, my touchpad worked again.

    But the screen issue began today…

    Ideas? What shall I do?

    I can’t stay to long without charging it, cause it doesn’t even take 15 min and the battery is ”empty” again.

    Help!

    Best Reguards.

  12. It’s me again!!

    I just read in another thread in this website my same prob. I pressed Fn+F8 and it worked!!

    Cheers LaptopFreak!

  13. So when i plug in my Dell Vostro 1500 the screen dims. I have the brightness settings in the power options set to the highest possible and it still has no effect on the brightness. What is the problem?

  14. Laptop Freak

    James,

    So when i plug in my Dell Vostro 1500 the screen dims. I have the brightness settings in the power options set to the highest possible and it still has no effect on the brightness. What is the problem?

    Check the BIOS setup menu. It’s possible that you can adjust the screen brightness in the BIOS. Apparently, the screen brightness settings are lowered for the AC mode.

  15. Hi,

    every time i plug my power cord into my HP lap top the screen gets dimmer but when i take it out it gets brighter, i already looked in the power options in the control panel but i couldn’t find anything to fix this… can i get a little help

  16. Hey Brandon,…

    Try to use Fn key with arrows up and down (Fn is blue, the sun icon on arrows also,… makes sense ??? no

  17. When I plug in my Dell Inspiron 1420 the screen dims. I have the brightness settings in the power options set to the highest possible and it still has no effect on the brightness. I know I should check the BIOS setup menu.–How do I do this?

    Thanks

  18. Laptop Freak

    Rachel,

    I have the brightness settings in the power options set to the highest possible and it still has no effect on the brightness. I know I should check the BIOS setup menu.–How do I do this?

    When you turn on the laptop the Dell logo appears right in the center. Take a look at the lower part of your screen, there should be instructions for accessing the BIOS setup menu. It will say, press Esc, F1 or F2 key (I don’t remember which one) to enter the BIOS menu. So, as soon as the logo appears on the screen, hit that button and you’ll get into the BIOS. You can navigate the BIOS menu using arrow keys.

    Also, have you tried increasing the screen brightness using the keyboard shortcut? Fn key plus up arrow to increase the brightness.

  19. My Dell e1505 No Power Using the Battery, but all 5 green lights are lit. By leaving the battery out and running the pc on AC it works fine. Battery only about 4 months old. When battery is replace to PC after a few hours battery does continue to change. When put back into the PC the battery indicator on the lap top flasses red.

  20. Rachel is right; Fn and arrows up or down to adjust. This is for the Dell Inspiron. Way to go Rachel.

  21. Jennifer

    I need help ._.
    My screen is really dim, I cant see anything, so im sitting here holdng a flashlight haha! anyways

    The screen gets really dim after the desktop appears, It can be good for some seconds and suddenly I need to use my flashlight, The screen is dim with and without the charger in!
    I’ve tried the FN +f7/f8 but nothing happens.

    It’s a Presario v6500 notebook!

    Is there something I can do?

  22. Jennifer

    Brandon and Megan,

    I’m also having the same problem with my dell inspiron 1720 laptop. The brightness adjusts perfectly when plugged in, but when running on battery power is dim no matter what I do to the brightness settings. I’ve tried all of the suggestions on here so far to no avail. I called dell tech support but my warranty is expired. The tech said it sounded like a hardware problem (the LCD or video card needed to be replaced) but I was hoping for other insight before I tried anything else. Thanks.

  23. Thank you for this! I adjusted the settings in my control panel and now my laptop is just as bright under battery power as it is when it’s running on electricity. It was a very annoying problem – so glad for your help.

  24. Hi there. I’ve got a different sort of problem with my Toshiba Equium A60. It’s been working fine for less than a year now but just yesterday when I tried to boot it up the screen was blank.

    I’ve been looking at other websites and they’ve just been telling me the things I already know like turning the brightness up with the Fn key and it could possibly be the alternate monitor key, again with Fn, but none of them seem to work.

    The battery is full and even so when I plug it into the main it still remains black but the power button is lighted up blue and the usb for my wireless mouse lights up as well. Is there anything I can do or is it something wrong with the wiring inside?

  25. i am getting dim screen with ac and battery when i changed to new lcd. i have to press fn to get brighten each time. is vedio card problem or what.i changed to new inverter also. no use. please help

Leave a Reply