laptop screen goes black when brightness is 100%. this is not those where decreasing it works

[ITOboba]

so my laptop screen goes black when my brightness is put on 100%.even if i put it on 99% it goes back to normal only when plugged in. (but it hurts my eyes) (i have windows 8.1 fyi) 

[Jeet_singh]

Hi @ITOboba,

Thanks for engaging in HP support Forums! This is a wonderful location to converse with the community, get assistance and find tips! I understand you are having issues with the display brightness not working properly on your HP notebook. Don't worry as I have a few suggestions which should help you resolve this issue.

To provide you with an accurate solution, I'll need a few more details:

Could you provide me with the exact model of the PC? Use this link to find it:  https://support.hp.com/in-en/document/c03754824  (Ensure you do not share any of your personal information such as serial, phone number, email ID, etc...).

Have you recently made any software or hardware changes on the PC before the issue started?

What happens if you make it to 0%, does the brightness increases or decreases?

Have you tried to uninstall and reinstall the display drivers?

In the meantime, let's try these steps here: 

Perform a Hard reset on the Notebook: A power reset (or hard restart) clears all information from the computer's memory without erasing any personal data. Performing a power reset might fix conditions such as Windows not responding, a blank display, software freezing, keyboard stops responding, or other external devices locking up.

Boot the computer into the Bios screen and check if the screen stays fine.

1. Turn off your computer
2. Make sure you have connected the power cable
3. Turn on your notebook, as it is starting press the  F10 button repeatedly

If you don’t have an alternate monitor, I recommend checking if the issue appears on the BIOS screen (restart the computer and tap on F10 to access BIOS) 

This would confirm if it's either a hardware failure or an issue with the graphics card drivers so we may reinstall and update the drivers to fix the issue as mentioned above. 

  

If the issue persists on BIOS as well, please try with a TV to identify if it's the LCD or the motherboard/video card failure, 

  

If the issue occurred after an accident (such as dropping it on the floor, liquid spilled on it, etc.) there could be a hardware failure and in such cases, you may need to get the computer repaired via HP (there could be a charge involved if the PC isn't covered by the accidental damage protection plan) 

For a start please try the steps to adjust the screen brightness from this link:  HP Notebook PCs - Display Is Dim or Difficult to Read (Windows 10, 8, 7)   and follow all the steps from this options

• Step 2: Adjust the display brightness in Windows
• Step 3: Adjust the display brightness in the battery settings

This should do the trick for you. If it still does not then please follow these steps

• Then uninstall the drivers from device manager. Steps
• Right-Click on start button> click device manager> expand display adapters>then select the display drivers that are listed and right-click on it and uninstall the drivers.
• Check the box that states delete the software for this device.
• Then restart the computer and update the bios chipset and graphic drivers from this link: https://support.hp.com/us-en/drivers  and then follow the steps from the first link mentioned above.
• Also, make sure that you select the power plan to a balanced one and follow the options from this link: http://hp.care/2rUUbXB  to manage power plans

Please let me know if this resolves the issue, or if you require further assistance!

Eagerly waiting for your response!

I hope you have a good day ahead,

And Feel free to ask your queries as this forum has some of the best people in the world available and ready to help.

Regards,