Screen brightness won't adjust

Hello,
I am unable to change the brightness of my pavilion sleekbook 15. The f2 and f3 buttons don't respond and when I try to adjust by going through 'control panel', 'screen', 'brightness adjust' it doesn't respond either even though if am able to move the cursor on the adjust bar.
Please can you help as my screen is stuck on the brightest setting and is very uncomfortable to look at.
Thanks
Dan

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Hello @Alacare ,
Welcome to the HP Forums!
I understand the brightness shortcut on your notebook is no longer working.
It would help to know which product and operating system you are using. For information on finding your product and model numbers click here: How Do I Find My Model Number or Product Number? To see which version of Windows you are using click here: Which Windows operating system am I running?
If this issue is new the easiest solution would be to do a system restore to before the issue started. You can access the system restore by tapping F11 while the notebook turns on.
Please let me know if that works, or reply with the notebook model and operating system.
I look forward to your reply!
Please click the "Kudos, Thumbs Up" at the bottom of this post if you want to say "Thanks" for helping!
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Dear Customer,
Welcome to HP Support Forum and we are glad to assist you.
It looks like you are trying "Adjust Screen Brightness in Windows 8.1" for your Notebook.
We will surely assist you with this.
Please perform this step as shown below to resolve the issue:
1. Go to Search (point at upper right corner) and type Device Manager. Go there.
2. Expand Display Adapters
3. Right-click Intel(R) HD Graphics and Left-click Disable
4. Restart your computer
Note: Your screen resolution might be distorted now, you can just ignore
5. Go back to Device Manager, Display Adapters
6. Right-click Intel(R) HD Graphics and Left-click Enable
7. Restart again
Note: If at any point your screen goes blank and won't come back, just HOLD DOWN your power button until
the computer shuts down. Then press power again to start up
Hope this helps, for any further queries reply to the post and feel free to join us again
"I work for Hewlett-Packard"
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