It is impossible to change the screen brightness with the hotkey (F11 and F12), or even with the slider in settings. 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. Brightness Setting Tool for Windows 10 (64-bit) - IdeaPad S405 Lenovo Inc. Some Windows 10 users are experiencing a problem with Windows 10 brightness control “not working”. This problem in the relevant drivers doesn’t allow you to. Jan 13, 2018 Lenovo Ideapad P400 laptop screen is very dim I moved my laptop to a new desk and cleaned the keyboard as well. Not sure if I hit some sort of key combination but now my display is very dim.

I've had my IdeaPad Notebook P500 for over a year, and rarely had an issue with it. Today, I accidently touched the F11 key, which happens to be the 'Brightness minus' key. Immediately, the screen went very dim, to the point where it actually hurts my eyes to be typing this.

I can adjust the brightness sliders up and down on the screen, using both the F11/F12 keys and the slider box available from the 'Brightness' selection under 'Settings'. Even though the sliders go up and down, the screen stays the same very dark level.

I have uninstalled and re-installed the Intel HD driver.I have shut down the laptop and turned it back on while holding the F12 (Brightness plus) button. I have even rebooted several times.

Brightness

Is there a way I can get this rectified ?