Using Windows 7 Display Won't Adjust Screen Brightness

I am running Windows 7 Home Premium Service Pack 1 running on my MacBook Pro from January, 2012. My screen will not adjdust brightness. Not using the F1 & F2 hotkeys (The window will pop up showing I'm pressing up and down on the screen brightness but nothing changes) even going in to Windows 7 control panel will not change this. I can't change the brightness or turn off the display with the hotkeys or in Windows 7 settings. I have BootCamp installed. Any body have the same problem or know how to fix it. I've tried updating my graphics drivers but I don't think it worked.

Take it to the Genius Bar. Your SIM might have an issue. The SIM is the part that manages power. My brother's Macbook Air has this issue. What haapens is the SIM malfunctions and gets confused on how much power to send to each part. Other symptoms include fan always running (even when its been off for a while), and you can't adjust the screen or keyboard brightness.

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Re: Satellite L855 and Windows 8 - can not adjust screen brightness

Hi everyone !
I installed Windows 8 on my Satellite L855 and it is running pretty well except that I can no more adjust screen brightness !!! I updated all the drivers for Win 8 but it didn't resolve the issue.
Hope someone can help me !! Thanks !!

Hi
Did you install the VAP (value added package) provided with Toshiba Win 8 upgrade assistant?
Its necessary and the brightness can be controlled pressing F button
F2 Decreases screen brightness
F3 Increases screen brightness

Not able to adjust screen brightness in Windows 8.1

hi,
I m using HP Pavillion N208TX with windows 8.1 64 bit version. i m not able to adjust screen brightness from f2 and f3 button and from the power setting also. when i press these buttons it shows the slider to adjust the brightness on top left corner of the screen but its does not adjust the brightness from low to high. i have already updated the Intel HD Graphic driver sent via link from HP Cust. care. kindly help me on this ASAP...
This question was solved.
View Solution.

Dear Customer,
Welcome to HP Support Forum and we are glad to assist you.
It looks like you are trying "Adjust Screen Brightness in Windows 8.1" for your Notebook.
We will surely assist you with this.
Please perform this step as shown below to resolve the issue:
1. Go to Search (point at upper right corner) and type Device Manager. Go there.
2. Expand Display Adapters
3. Right-click Intel(R) HD Graphics and Left-click Disable
4. Restart your computer
Note: Your screen resolution might be distorted now, you can just ignore
5. Go back to Device Manager, Display Adapters
6. Right-click Intel(R) HD Graphics and Left-click Enable
7. Restart again
Note: If at any point your screen goes blank and won't come back, just HOLD DOWN your power button until
the computer shuts down. Then press power again to start up
Hope this helps, for any further queries reply to the post and feel free to join us again
"I work for Hewlett-Packard"
* * * * * Click the "Purple Thumbs Up Icon in the lower right corner of a post" to say thanks * * * * *
* * * * * Please mark Accept As Solution if it solves your problem * * * * *
Regards,
K N R K

How adjust screen brightness in Windows 7?

I used to use a Windows 98 laptop up to 3+ years ago, but since moving to Mac have largely forgotten how Windows works. I now have Windows 7 on Bootcamp and can't see how to adjust screen brightness. Surely there should be an adjuster on the System Tray (that's what it used to be called) bottom right next to the clock. I'm on 20" iMac with Apple keyboard (the long one with number pad at the right).

Does the keyboard have brightness controls on the F keys?
If these do not work: try holding fn and using the F keys.
If that does now work I have to ask: have you installed the bootcamp software? you need to make a CD (or usb stick) of drivers and software from OSX then boot into wiondows and run it.

Cannot Adjust Screen Brightness after Windows 8.1 Update

Cannot Adjust Screen Brightness after Windows 8.1 Update....i am using sony vaio laptop....i recently updated windows 8 to 8.1

Hi:
Most likely you need to install the graphics driver for W8.1 from your PC's support and driver page.

Have Upgrade Graphic Card Driver, But Still Cannot Adjust Screen Brightness and Sleep Button Not Showing After Clean Installation of Windows 8.1

I have done clean installation of Windows 8.1 on my HP Pavilion G4.
Then I realize that I cannot put my computer on sleep mode and cannot adjust screen brightness.
I understand that those problems caused by the graphic card driver.
My computer is running on AMD Radeon HD 6400 series.
Thus, I manually search on internet and found a latest graphic card update on microsoft site that is claimed compatible on windows 8.1 (link: http://msdn.microsoft.com/en-us/library/windows/apps/dn344644.aspx).
I've upgraded it into the latest one. I've check on Device Manager, the driver is running well.
But my problem did not solved!
Please give me the solution!

Hi,
How about go to Device Manager, then uninstall Graphic driver and restart your computer, system will install its build in graphic drver. You can have a try.
In addition, access to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Brightness and set its value to 100 for test.
Roger Lu
TechNet Community Support

Cannot Adjust Screen Brightness after Windows 10 Update

I Cannot Adjust Screen Brightness after i update my windows 8 os to windows 10. please give me solution. thank you

c00lajay wrote:
I have tried uninstalling the Graphic drivers, re installing from hp assistant, I even tried directly from Intel drivers but it is not letting me adjust brightness =( Latest driver version to my 4400 Gcard was 27/07/2015 I guess we have to wait since those drivers are win8.1 compatible only =(
Hey, I tried updating the driver, I googled something like intel graphic 4400 windows 10
Then I found this link
https://downloadcenter.intel.com/download/25150/Intel-Iris-Iris-Pro-and-HD-Graphics-Production-Driver-for-Windows-10-64-bit
read at descriptions to see compatible chipset. After I downloaded it started installing and the screen starting to do the "power off" think it does whenever you're installing video drivers et voila! ´the brightness went down and now my "brightness up and down" keys are working ='3
I hope this help you guys

How to adjust screen brightness in windows 10

since i have upgraded to windows 10, i m not able to adjust my laptops screen brightness cause i m not getting the option to adjust screen brightness, nor the screen brightness up and down buttons are working. Also i have updated the graphic adapter and still the condotion is same...no change!! plz someone give me the solution to get rid of this problem

Cannot adjust screen brightness

I have a Lenovo G585 and after updating to Windows 8.1 can no longer adjust the screen brightness, it used to work fine. I also had a problem with sound after I installed 8.1 but managed to fix that.
Adjusting the brightness from Settings > Brightness does not work, nor does adjusting brightness from Battery Life > Adjust Screen Brightness or by using fn + up/down key.

hi jackbeazley,
Welcome to Lenovo Community Forums!
Open Device Manager and open Display adater.
Right click on AMD graphics and choose Uninstall
Be sure to place a check under delete driver software for this device.
Now Restart the computer and install this driver
AMD Video Driver
Check if the Screen Brightness will work now
Hope this helps
Cheers!
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Adjust Screen Brightness

I am currently using a HP ProBook 450 Gi - Serial # [Personal Information Removed] and i am unable to adjust the brightness of my screen.
I do have a secondary screen plugged in via screen cable connection.
Please help - its driving me crazy!

Dear Customer,
Welcome and Thank you for posting your query on HP Support Forum
It looks like you are trying to find the steps to increase or decrease the screen brightness for your Notebook
Method 01.
Open Windows Control Panel, click on Hardware and Sound, then in the Power Options Section, click on
"Change power-saving settings." There's a slider to adjust brightness at the bottom of the window.
Method 02.
Open Windows Control Panel, open Windows Mobility Centre and adjust the brightness here
Method 03.
On most of the Notebooks, tapping F3 and F2 Key will often increase and decrease the screen brightness
Please check the links shown below if the above mentioned method doesnt resolve your issue:
HP On-Screen Display Utility
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-106851-2&cc=us&dlc=en&lc=en...
Quick launch Button Driver
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-104698-1&cc=us&dlc=en&lc=en...
Hope this helps, for any further queries reply to the post and feel free to join us again
**Click the KUDOS star on left to say Thanks**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
Thank You,
K N R K
I work on behalf of HP

Cannot Adjust Screen Brightness with Fn Keys on New L540 (8.1 x64)

Hello everyone. I just purchased a new L540 with Windows 8.1 x64 on it and have run into a problem I'm seeing is apparently common. While my other Fn keys work as intended, I cannot adjust screen brightness with them. Pressing the buttons just does nothing and the laptop is running at full brightness at all times, even when on the battery. I have installed the latest Power Management Driver and from what I can tell, there is no version of the Power Management Software for anything newer than Windows 7. I also have installed the latest Hotkey driver (in fact, I've installed all the latest drivers for this machine.) I read in another thread that this can be caused by the latest HD Graphics driver from Intel but I actually can't even install that driver (says my system is not supported) so I am still using the latest Lenovo provided driver.
Can anyone please assist with this? I want to be able to quickly adjust screen brightness when on battery but I can't do that at present. Thanks!
Solved!
Go to Solution.

I have the same problem with my L540. It started with the update of the BIOS to version 1.65. Because I didn't find a solution, I went back to BIOS version 1.64, where all the brightness options are there and work properly.
You can download older versions. When on the page with the new drivers (http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS037285) go to BIOS Driver 1.65, then choose "learn more". At the end of the following page you'll see all the older versions.
That you can install version 1.64, you have to change the "Secure RollBack Prevention" Option in the BIOS: Restart the Computer. When you see the option "To interrupt normal startup, press Enter", press Enter. Press once again Enter. Press F1 to enter the BIOS Setup Utility. Choose "Security" -> then "UEFI Bios Update Option" -> then "Secure RollBack Prevention". Change this option to "Disabled". Then press F10 to save configuration changes and exit.
After restarting Windows you can install BIOS 1.64.
Another possibility is to wait for the next BIOS version ....

Feature Change: Remove useless adjust screen brightness button.

Remove useless button for screen brightness.
both buttons serve same function.

Oh - that explains it better.
You do know that not every computer using Windows 10 has a key available to adjust screen brightness though, right? Or, as in the case of the Surface, if you don't have a keyboard, the only way to adjust the brightness is only the software one?
For you it might not make sense, but include ~1 billion more people, and I think they should just leave both.

I have a 17" Macbook pro with flickering red and cyan(blue) lines across the screen. The issue disappears temporarily when I tap on the computer, and the problem does not occur when I use external display or try to screen capture the problem.

I purchased my Macbook (17") through a certified apple tecnition in August 2012, it was refurbished and the motherboard was completely replaced. I do a lot of photo editing, but I have been unable to do so because of the red vibrating lines that interrupt my screen. The issue disappears temporarily when I tap on the computer, and the problem does not occur when I use external display or try to screen capture the problem. I brought the computer back to the technition I purchased it from and he said that it was a problem with my fan, so I have two new fans but the issue is still occuring. He says he doesnt know whats wrong. Does anyone have any information on this issue?
Here is an image of the issue
http://www.flickr.com/photos/67839707@N08/8884847081/

I recommend having your Mac serviced by someone competent. A force sufficient to "blow apart" the fans was clearly excessive and may have damaged the display cable, as well as any number of other problems.
Dust is properly cleaned with a vacuum, preferably one designed for computer service, and they are not cheap.
Compressed air should never be used. It just blows dust everywhere, often into places where it can no longer be removed.

Cannot adjust screen brightness in Windows 8.1 on my G50-45

Hello there,
I just bought my new lenovo and instantly upgrade the system software into Windows 8.1.
Everthing looks fine instead of the screen brightness adjustment, i've downloaded the latest graphic drivers but nothing happened.
The display adaptor section into device manager keeps showing up that the driver is Microsoft Basic Display Adaptor rather than AMD radeon R2.
Thanks in advance guys.

hi kostas-mi , ecountered that issue a month ago and was able to resolved it
things you can try:
1- you can roll back the driver back to its stock state, if this doesnt work ,
2- install latest driver of your graphic card
3- This step will fix the problem:
- go to registery by regedit and change the value to 0xf048
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000]
"FeatureTestControl"=dword:0000f048
OR
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001]
"FeatureTestControl"=dword:0000f048
Dont fake the funk............

Adjust screen brightness Windows 10

I have a HP Spectre x360 - 13-4009na and have just upgraded to Windows 10. The problem is I cannot alter the screen brightness using any of the usual methods. - The fn buttons do not work- There is no brightness control displayed on the Control panel - Power Options- The Calibrate Display Colour method fails with an error while "... preparing to calibrate ..." - "Unspecified error". So my display is set to high brightness and I cannot change it. Please can someone help? Thanks, Paul.

Omg, I had the same issue too. I kinda tried changing it with the AMD driver (that I had to re-install after the Windows 10 update) it was pre-installed when I first got my laptop, anyway besides the point, I used it and it kinda changes your brightness, but not the same way as using your brightness control buttons to. I hope that helps much, It didnt exsctly satisfy me. But the AMD driver (if you have a laptop) is a great driver that runs your graphics really smoothly

Using Windows 7 Display Won't Adjust Screen Brightness

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