brightness not working

[Peppa2]

I have i hp notebook it's windows 10 after the latest update my brightness buttons stopped working then i tried to change the brightness from settings it also didn't work then i searched on net it also didn't  work now i don't know what to do. My laptop's brightness is not adjusting.  

[Echo_Lake]

@Peppa2

Thank you for posting on the HP Support Community.
 

Don't worry as I'll be glad to help, I understand you are unable to control brightness settings after the latest windows update, to provide an accurate resolution, I need a few more details:

• Have you tried adjusting the brightness setting from the notification panel? 
• What is the product number of your device? Use this link to find it: http://support.hp.com/us-en/document/c03754824

Keep me posted for further assistance.

[Peppa2]

yes i have tried

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[Echo_Lake]

@Peppa2

Thank you for posting back. 

Firstly, perform Windows Update and HP Support Assistant: (do not skip any troubleshooting steps if you feel steps are repeating) 

To check for updates now, select the Start button, and then go to Settings  > Update & security  > Windows Update, and select Check for updates.

Install updates from HP Support Assistant: Go to Download HP Support Assistant to install the tool.

1. To open HP Support Assistant, double-click the HP Support Assistant icon .
2. Click My devices in the top menu, and then click Updates in the My PC or My notebook pane.
3. Click Check for updates and messages to scan for new updates.
4. Review the list of updates. Updates with a yellow information icon are recommended. Updates with a blue information icon are optional.
5. Click the update name for a description, version number, and file size.
6. Select the box next to any updates you want to install, and then click Download and install.

And, also BIOS Update: Follow steps from the link: https://support.hp.com/in-en/document/c00042629
 

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.