Lenovo G40-70 B / G Series :: Brightness Buttons - F11 And F12 Don't Work
Jul 2, 2014
I've just acquired this Lenovo G40-70, it came with Linux so I installed Windows 7 Professional 64bits and downloaded all the drivers from the support page for my computer, I've got everything working except for this three buttons: Brightness+/- , and the Airplane button.I've reinstalled all the drivers from your website, and also the last graphics software from intel ... nothing works ...
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Nov 12, 2014
Brightness on thinkpad doesn't work.
I have reinstalled my thinkpad W540. For display driver I have downloaded latest version from Nvidia. All other drivers are installed from Lenovo website.
OS: Win8.1 pro
When I push the F5 or F6, display brightness bar is shown, but nothing happens.
Already tried
- reinstall drivers after delete device in device manager
- reinstall programs after delete all drivers from nvidia and intel in program and features
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Dec 17, 2014
the two buttons to control brightness worked fine before I uninstalled the default graphics driver. Now, when I press it I still get the GUI slider, but the brightness does not change. My brightness can be changed fine in the windows power settings. I have reinstalled the same thing I uninstalled, reinstalled Energy Manager, and still it does not work.
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Jan 28, 2010
I have a generally very nice install of Win7 Ultimate on a new SSD. But I can't control the screen backlighting or use the volume buttons. Other things I don't have that I could do without, but would be nice are the AV buttons. Not sure how well the stock Window power management is. I've tried loading a mess of the drivers from the TX850P/B Vista drivers page. There is a thread saying this the drivers work, but the drivers linked to in that thread to not match what is being discussed? Windows 7 Installation for Sony Vaio TX Series with ALL Sony Functions
The drivers from here: [url] install, but don't seem to do anything.
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Dec 19, 2013
I've got little issues with screen brightness on my T510.
Sometimes after returning from hybernate/sleep I cannot control screen brightness at all (chaning it by Fn+Home/End or from PowerManager just dont work).
I have got latest nNvidia NVS 3100M drivers.
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Jul 29, 2014
Only Fn+space work.
I have Windows 7 Ultimate 64 and why this doesn't work.
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Nov 25, 2014
The company I work for just gave me a new Thinkpad T440P and I have a screen Brightness problem. the shortcuts on the keyboard doesn't work with or without the fn button and the brightness gauge doesn't show up in the power options too.
Someone suggested to that I should download and install the latest Intel HD Graphics Driver for Windows 7 from the support page [URL] ... but after the installation ended a pop up on my screen said that my Laptop doesn't have the minimum requirements for this driver! so who come it's in the drivers section for this model?
Link to image
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Jan 19, 2009
My question concerns the non-functioning sleep mode buttons on my Lenovo W540 20BG.
In my current power management settings, the W540 is suppose to enter sleep mode by pressing Fn4 or by pressing the round power button shortly. However, either one of these methods do not work.
My computer does enter sleep mode when usign the Windows start menu (Start->Shut Down -> Sleep).
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Dec 20, 2013
I recently bought a Lenovo G505s about a month ago. Everything is fine with it until i downloaded Steam and downloaded some games. 3 of the games i downloaded are shooters and therefore require the left mouse button. But when i click it to shoot, it doesn't respond sometimes and is very laggy. This is not the fault of the game as i tried it in different ones but the problem is still there. i tried to switch round the buttons (so that the right button is to shoot and the left to aim) and it works fine...
If it is needed here are some specs for the pc:
AMD A8
6gb ram
WIndows 8.1
Also the buttons and trackpad work completely fine with everything else except games including Minecraft. it seems that when i am moving with WASD the button doesn't work but the right click button does.
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Mar 6, 2013
I'm using a W530 with the following configuration :
Windows 8.1 x64
Synaptics driver 16.2.19.14
My problem is that even though I set the PalmCheck settings to minimum, I have a delay before I can use the left button under the touchpad. The PalmCheck seems to work only on the touchpad functionnalities, not on the buttons below.
How to use those left/right physical buttons below the touchpad while hitting keys on the keyboard ?
W530|i7 3720QM|16GB|K2000M|240GB SSD|500GB 5400rpm
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Apr 3, 2014
I've started using HP ProBook 4530s with Intel Graphics on it. Then, I installed Win 7 Ultimate x64 on it and figured out, that brightness buttons don't work. (sound/music controls/sleep buttons works fine) Automatic
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Jan 26, 2014
All was fine until I pressed F12. Now even on maximum brightness it's really dim.
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Aug 27, 2012
I just bought my laptop. Installed Windows 7 clean 64bit on it.This is the laptop's product page. I can't change the brightness of my laptop's screen. I can't do via the [Fn+Up/Down] combo nor by the Windows Power Options interface.
I tried all combos of installing and uninstalling the Lenovo Energy Management. (I got v7.0.4.1 on my laptop).I tried un and installing Intel HD 4000 (Driver v8.15.10.2696). I get Lenovo ACPIVPC v7.1.0.1 (12/15/2011) when installing the energy management thing.I've tried to install as least as possible other Lenovo crapware.
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Jun 3, 2014
I can't adjust or change my brightness with the hotkey (F11 and F12) or even with the slider in settings. option brightness of my laptop doesn"t change it is stationary.
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Nov 24, 2012
I have a new z500 that I've downgraded to Windows 7 64bit. For the most part I have everything working. I accidentally hit the brightness + (yes, +) and it instantly dimmed the screen to where it is barely viewable. It seems that hitting that one key decreased the brightness to the minimum amount. I've rebooted, looked for a setting in the BIOS, hit the Brightness +/- and can't increase the brightness. It is interesting because the other hot keys work correctly. I've even upped the brightness in the Control Panel, but nothing seems to work. The screen is extremely dim whenever the machine is powered on (including the BIOS), not just in Windows. I tried a lot of intel chipset drivers, the available Intel HD 4000 drivers in Win8 and win7 too, but nothing working. How to up the brightness?
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Oct 8, 2013
I have had this computer for about 9 months and just recently have been unable to adjust the screen brightness. I have had this problem for a couple weeks and have installed all available updates and restarted the computer. I could not find any relevant information on this issue. My product is in warranty until December ....
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Nov 11, 2013
I had lenovo g500s recently with windows8 64bit preloaded. I got bored from windows8 and downgraded to windows7 home premium 64bit (a difficult procedure by the way)....
Windows 7 worked very fine after installing the device drivers, except for the LCD brightness that doesnt respond to any fine adjustments...
In the main page of windows power management, as well as the keyboard hotkeys, the slider either goes to the maximum or minimum brightness (no stages in between though in windows 8 there were > 6 stages)....
In the advanced settings screen, as far as i adjust brightness (for example to 50% on battery, 70% plugged in) this doesnt lead to any change in the brightness practically....
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Jul 4, 2010
I have a W500, ATI Mobility FireGL V5700, Windows 7.
When I press FN+Home and FN+END to regulate brightness up or down, the brightness symbols turn on and goes up/down, but the screen brightness is not regulated up or down but stays constant somewhere in between.
What can I do to get "brighness" working?
It has never worked, the computer is 2 months old. I have upgraded from Windows 7, 32 bit to 64, but brightness is still not working.
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Mar 25, 2010
after I put the parts back in, most of the keys on keyboard, touch pad, the sexy green light, the led light on the upper part don't work!
The graphic switch still work, the vaio, assist, special and disc reject button still work. Some of the keys still work like "w p s z '" and space bar
The left, right, down arrow work, up arrow doesn't work
Can't adjust the screen brightness even in the power option.
The fingerprint work.
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Apr 13, 2013
I used my brightness down button once and now it won't go back up. I can't adjust the settings at all, despite the graphic on the screen showing me the meter going up and down. I've checked all drivers, tried uninstalling and reinstalling lenovo energy management, and I've still got nothing. I've stopped short of a factory reset because that's super annoying having set everything up and then a couple weeks after purchase have to do it again.
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Jun 27, 2014
For some reason I can't change my screen brightness anymore. I've already tried a HD 4000 driver rollback to version 9.17.10.3223 and I also disabled "adaptive screen brightness" at the power management. For some reason I can change the brightness by using the "microsoft basic display adapter" driver instead of the HD 4000 but that isn't a real solution.
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Jun 16, 2014
My lenovo G505 recently had to be reformated because there was a blue screen that came up one day that said there was problem with my PC and the error was critical_service_error, something like that. So my dad had to reinstall windows 8 for me using a cd he had that didn't come with the computer I don't believe. So now for some reason my screen brightness isn't adjusting and it's driving me crazy! It's staying on full brightness which I hate! I tried changing it from the personalization screen and nothing happens.
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Jan 5, 2014
When plugged into the adapter my Levovo Z570 screen flickers between bright and dark when on certain webpages or doing certain tasks. I have changed the battery and this makes no difference. This doesnt happen when on battery power.
Note that the brightness is flicking between the battery brightness setting and plugged in brightness setting. So if there is a large difference between the two the flickering is very noticable and distracting. If I make the battery brightness the same as the plugged in brightness the flickering doesnt happen.
Lenovo IdeaPad Z570 15.6 inch Laptop - Gunmetal (Intel Core i7 2670QM, RAM 8GB, HDD 750GB, NVIDIA GT520M 1GB, Blu ray, WLAN, BT, Webcam, Windows 7 Home Premium 64 Bit
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Feb 8, 2015
I have a W540 with 3K Ips panel and Windows 7 Pro 64bit.
I recently installed a new hard drive and installed windows 7 pro 64 (previously on the other hard drive was Windows 8.1 Pro 64 bit ( there I could change the brightness ) )
My problem is that I can not change the brightness .
I've already tried:
-Reinstalled all NVIDIA driver
-Reinstalled all Intel graphic drivers new
-Reinstalled Intel and Nvidia drivers simultaneously
-Remove Lenovo Power management
-Tried to install NVIDIA driver from the Lenovo and the Nvidia page
-Reinstalled Windows
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Dec 10, 2012
I recently purchased a lenovo p500 ideapad from bestbuy around 3 weeks ago. just on thursday, i press the f11 key to lower the brightness and it imidiatley went very dim. i cannot bring the brightness back up even tho the button and the computer says the brightness is all the way up. the screen is at the dimmest setting possible. i am running windows 8 and i have checked the drivers to see if they are updated and they are but i cannot bring the brightness back up. this is very frustrating.
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Feb 14, 2014
I will keep this short, I have a Lenovo ideapad y510p with Windows 8.1 (I got it with 8.1, did not upgrade from 8) . I noticed a problem yesterday, where I cannot adjust the screen brightness. If I use the keyboard commands (Fn + Up and Fn + Down) The slider appears on the top left of the screen, as always, but does not “slide” It stays static.
If I move the slider on the Setting menu, I can slide the value but the brightness does not change and the value is not reflected on the slider on the top left of the screen.
I am not sure when this happened for the first time.
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Nov 13, 2014
I can't adjust brightness ....
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Jan 8, 2009
I have been trying to resolve this problem for the past 5 hours and am having no luck. I have an Acer Aspire 4710Z laptop and the touchpad left and right buttons will not work.
To select anything I have to tap the pad,I've tried to re-install drivers but to no avail.
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May 1, 2009
I have this laptop Dv7-1110eg.... Vista Ultimate 64bit
Just buy, the video card did not work ... was a hardware problem ... HP came to seek the ... did little more than 10 days ... HP has returned to me the laptop ... and now everything works perfectly, minus the touch volume controls... the play, stop, and other ... activating and deactivating the wireless network...
If turns the volume on the taskbar touch control changes color ... that works, but fingers (touching it) does not work ...
Deploying the volume bar in the taskbar and click on the volume control Touch ... volume bar is moved a few millimeters, but always returns to the same place
HP has changed my motherboard for the problem of video ... if I remember that before the touch controls worked lead to perfection ...
Just as I returned the touch controls not working ... trying to solve the problem .... I installed Vista Ultimate 64bit and I downloaded all the drivers here [url] I have installed all ... even update the bios ... touch controls do not work
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Dec 2, 2009
i installed the newest drivers from hp (6.50.9.1), didn't help. uninstalled them, installed 6.50.7.1, didn't work.
that and i've been getting that system sound you get from plugging in or unplugging a USB-device, even though i'm not doing that (know what i'm referring to?)
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