• Lenovo Ideapad P400 Brightness Control Not Working Independently
• Lenovo Ideapad P400 Screen Brightness
• Lenovo Ideapad P400 Specs

Game ctr ppsspp. Hi, I have a Lenovo p400 touch laptop with the intel HD graphics 4000. I updated to windows 10 a while ago and everything was working fine for a bit. Then one day while using the laptop I went to adjust the brightness and when I pressed the button to lower the brightness a little, the screen went down to the lowest brightness and I could not. More info on Lenovo ideapad z500 brightness adjustment RECOMMENDED: Click here to fix Windows errors and optimize system performance. Thank the Intel Chipset Driver and reboot.3. Hi, I bought new z500 ideapad and funkcion buttons f11,f12 are not working to adjust brightness. Hi shockwave3, Can you try to apply the fix by help or advice? Solution to Brightness not changing in lenovo laptops after upgrading to windows 10 Using Regedit FeatureTestControl.

PROBLEM

As of January 2018=9, the problem still arises when an unsuspecting user attempts to control the screen brightness by using F11 (neg brightness) or F12 (positive brightness) with Windows 10 OS.

Under certain scenarios, this results in screen going to the darkest setting and F11 or F12 keys will not change the screen brightness.

With Windows 8, you could have defaulted to Microsoft Display driver to fix this problem, but this solution is no longer available under W10

APPLICABILITY

This solution is applicable to IdeaPad Z400 and Windows 10

SOLUTION

You will need to downgrade the video driver. Unfortunately, if you attempt to change the brightness, the screen will go dark and you will need to re-install this driver.

• Step #1 – Search for “Lenovo IdeaPad P400 Intel video driver” (https://support.lenovo.com/us/en/downloads/ds031547)

• Check your Windows version an download the appropriate version. For example, if w10 is 32 bit, then download the 32 bit driver (1hvi13w8.exe); for the 64 bit version, download the 64 bit driver (1hvi14w8.exe)
• Double click to unpack (don’t worry, the screen will say installing – ignore this message)
• Once unpacked, you will get a pop up screen to install (again). Uncheck the box and click FINISH
• Using Windows Explorer (file manager), go to C:driversintelintel video drivers then double click setup.exe to install
• Reboot and your problem should be fixed!

Lenovo Ideapad P400 Brightness Control Not Working Independently

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Lenovo Ideapad P400 Screen Brightness

Reference Links

Lenovo Ideapad P400 Specs

• Lenovo Forum – Ideapad Z500 Touch Win 10 Brightness Problem