Lenovo Ideapad P400 Brightness Control Not Working

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PROBLEM

P400

After installing Windows 10, I noticed that my brightness settings do not work. I can not lower the levels whatsoever. 2.4 ghz wireless optical mouse tested to comply with fcc standards driver. Is there a way I could fix this issue? I have a Lenovo Ideapad P400. My display adapter is the Intel (R) Graphics 4000. Solution to Brightness not changing in lenovo laptops after upgrading to windows 10 Using Regedit FeatureTestControl. How to Adjust Screen Brightness - ThinkCentre, ThinkPad. PC Data Center Mobile: Lenovo. Our Company News Investor Relations Sustainability. Some Windows 10 users are experiencing a Windows 10 brightness control “not working” issue. To solve this, you need to follow simple steps. Look up for the Display Adapters in Device Manager.

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.

Lenovo ideapad p400 touch

Windows 7 home basic 32 bit service pack 2 download. 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)

Lenovo Ideapad P400 Brightness Control Not Working Windows 10

  • 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 Problem

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Reference Links

Lenovo Ideapad P400 Brightness Control Not Working Linux

P400

Ideapad P400 Drivers

  • Lenovo Forum – Ideapad Z500 Touch Win 10 Brightness Problem