Lenovo P400 cant adjust screen brightness

Updated to windows 8.1 and now can not adjust my screen brightness on my Lenovo P400. I tried updating the display driver through the device manager and it told me there were no available updates.

Hi,
Have you tried the method above for test?
Generally speaking, this problem probably caused by Graphic driver problem, please check and make sure your Graphic driver is compatible with Windows 8.1.
In addition, also make sure your motherboard and chipset driver was upgraded to be latest.
If possible, also please upgrade your BIOS to be latest.one
Be warned.
Flashing BIOS is a risky process. If power is interrupted during the update your machine will be rendered unusable.
Roger Lu
TechNet Community Support

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New W520 cant adjust screen brightness!

Hello,
I am new to the forum and new to lenovo.
Just started setting up my brand new w520 and the Fn+Home/End keys dont work to control display brightness.
Any w520 owners having this problem as well?
edit note:- split from initial thread. change subject to reflect content.

@johnt7225,
Appreciate if you could try running TVSU and Windows Update to ensure all the drivers are installed.
Also is X-Rite a default software which comes with the W520? (I am unable to confirm this as I do not have a W520 to test on) ...
If X-Rite is the one acting up and causing the screen brightness adjustment to not work, I would need to escalate this to engineering.
Thanks Johnt725.
//JameZ
Check out the Community Knowledge Base for hints and tips.
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Cant adjust screen brightness

Hi there,
I cannot adjust my screen brightness after replacing my screen cuz I'd broken my screen. The followings are my computer details:
Computer system: Window 8.0
Minotor: Thinkpad MaxBright Display 1600x900 (checked the device manager and show hiden device, this is the only two)
display adoptor: Intel Graphics 4000
Can somebody help?

Hi Advance23,
Thanks for your reponse I appreciate that.
Yes, i have just reinstalled Windows 7 64bits home premium on mt laptop (and I believe it's the latest version and with most present updates). After the installation, all the funtion keys are not working, e.g. Brightness adjustment/volumn adjustment etc.
I did some research before posting this post and followed the steps on "Resolving Problems with the Brightness of the Display" from HP website to try to fix this as well, however i did not have much luck.
One thing I haven't try is to download the drivers for HP, as there are too many drivers out there im not sure which one to download, so if i'm going that way would love to have someone's professional guide of which one should I donwload in order to fix this problem.
Btw, since the system is newly installed the HP support desktop usually appears before going into windows is not there anymore, don't know if this is relavent to the issue here.
Please help me with this, I really need to get my laptop going but now with such a bright sceen I have to ware a sunglasses
Thanks

Cant adjust screen brightness after reinstalling windows_DV7-4080us

Need help with my HP DV7-4080us.
I can't adjust the brightness of my monitor and it's soooo bright that it hurts my eyes. Tried using the function key but no response at all, please help~~
Lily

Hi Advance23,
Thanks for your reponse I appreciate that.
Yes, i have just reinstalled Windows 7 64bits home premium on mt laptop (and I believe it's the latest version and with most present updates). After the installation, all the funtion keys are not working, e.g. Brightness adjustment/volumn adjustment etc.
I did some research before posting this post and followed the steps on "Resolving Problems with the Brightness of the Display" from HP website to try to fix this as well, however i did not have much luck.
One thing I haven't try is to download the drivers for HP, as there are too many drivers out there im not sure which one to download, so if i'm going that way would love to have someone's professional guide of which one should I donwload in order to fix this problem.
Btw, since the system is newly installed the HP support desktop usually appears before going into windows is not there anymore, don't know if this is relavent to the issue here.
Please help me with this, I really need to get my laptop going but now with such a bright sceen I have to ware a sunglasses
Thanks

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 ....

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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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.

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

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"
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Regards,
K N R K

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.

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 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.

Cant adjust my brightness setting after updating window 8.1

My comp cant adjust its brightness and its super bright help please?

Hi,
How to Find the HP Model Number and the HP Product Number or let HP automatically find your PC model number and HP network attached printers.
There are numerous driver updates posted under Windows 8.1
Start with the chipset then reboot and apply the others.
See if you then can adjust the brightness via the Windows 8 settings then the Intel Control Panel Display.
Try the firmware update posted under Windows 8 if all else fails.
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Lenovo P400 cant adjust screen brightness

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