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brightness issue

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HP Notebook - 15-ay513tx
Microsoft Windows 10 (64-bit)

unable to use the brightness control keys..f2 and f3..

and the NIGHTLIGHT option has been disabled...pleasw tell me the solution..this high brightness is  irritating my eyes

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Message 2 of 2
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Hi @kmd42,

Welcome to HP Forums, this is a great place to get support, find answers and tips.

Thank you for posting your query, I'll be more than glad to help you.

I understand that you are facing issues with your HP Notebook - 15-ay513tx wherein you are unable to use use the brightness control keys f2 and f3 and also the nightlight option has been disabled.


Let's go through a few steps that may help to fix this issue.


You may follow the steps provided below:

  1. Click the Start button, then click Run.   

  2. In the Run window, next to Open, type MSCONFIG.   

  3. Press the ENTER key.   

  4. In the System Configuration Utility window, click the Startup tab.   

  5. On the Startup tab, under Startup Item, ensure that there is a check in the HKserv checkbox.   
    NOTE: If HKserv is missing, reinstall the Hot-Key Utility application by Clicking here 

    For Windows 10 drivers: Click here  

(ignore the ads, 3rd party link has been sent to ensure your issue is fixed, I'm going beyond my way to help you and if you would like to give me virtual high five, Click on the purple thumbs up 🙂


If the above doesn't help, please create another User account as suggested earlier and try again. 


You may also update the drivers from the link:


Let me know how this works.

You have a good day ahead.

I am an HP Employee

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