Adjusting screen brightness

[Jont44]

I am unable to change the brightness with the function keys (f2, f3),  or system settings. Using the f2 and f3 keys does change the slider position but there is no change in brightness. When I go to System (display, sound, notifications, power) and move the brightness slider with the mouse there is no change in brightness. This is with the laptop display. I have not checked with an external monitor yet.

[old_geekster]

@Jont44 , welcome to the Community.

Here is the User Guide: http://h10032.www1.hp.com/ctg/Manual/c05641853.pdf

If you look at "Action Keys, Keyboard areas, Page 13, the second and third keys from the top are the keys to Decrease and Increase brightness.  I can't find any information about the F2 and F3 keys in the Guide.

Please click the Thumbs up + button if I have helped you and click Accept as Solution if your problem is solved.

[Paul_Tikkanen]

Hi, @Jont44 

If the graphics driver is installed and reports working properly, see if installing the HP System Event Utility allows you to use the Fn keys to adjust the brightness.

Get HP System Event Utility - Microsoft Store

[old_geekster]

@Paul_Tikkanen, your link is not functioning properly!  The error message states the page can't be found.

[Paul_Tikkanen]

Hi, Gene:

It works fine for me. 

[old_geekster]

Hey Paul, I still get the error message using Firefox 88.0.

Update: I just tried it again and it worked this time.  Thanks!

Something strange is going on.  I tried the link one last time to make certain it was working and I got the error message again.  I don't know what is happening.

[Jont44]

Thanks for getting back and I'm sorry for the slow response.  On this model the screen brightness keys also serve as function keys 2 and 3 and are activated by pressing the fn key.

I have located the problem and a solution. Thanks to your post and another one I narrowed the problem down to being software and not hardware. I used the "Intel Driver & Support Assistant" app to identify that there was in fact a driver issue even though the Device Manager indicated that there was no problem. Long story short, I used the support assistant to fix the problem and it in fact did. I do not know which file was replaced by the assistant because all it said was one file was replaced. But it fixed the problem.

[Paul_Tikkanen]

You're very welcome. 

Glad you were able to get the brightness keys to work again. 

[Jont44 · Accepted solution]

The Device Manager indicated no problem with the Display Adapter.  But I have located the problem and a solution. Thanks to your post and another one I narrowed the problem down to being software and not hardware. I used the "Intel Driver & Support Assistant" app to identify that there was in fact a driver issue even though the Device Manager indicated that there was no problem. Long story short, I used the support assistant to fix the problem and it in fact did. I do not know which file was replaced by the assistant because all it said was one file was replaced. But it fixed the problem.

[old_geekster]

Thank you for the excellent update on your problem, @Jont44!

I have always said that 15% to 20% of problems are caused by hardware and the remainder by software.  I have proven this time after time in my 30+ years of computing.