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Troubleshooting black screen issues on HP Notebooks: Click here to view the instructions!

‎08-19-2023 10:28 AM - edited ‎08-19-2023 10:36 AM

HP Recommended
Product: HP EliteBook 840 G5 Notebook PC

Hi,

 

I have this laptops with a freshly installed Windows 11 Pro copy. I also installed HP's Support assistant to automatically get the required drivers.

However, two problems remain:

1. the brightness buttons (F3 and F4) aren't changing the display brightness. The on-screen brightness indicator does show, but not the brightness per se. Same goes with the Windows-provided brightness slider. The night mode display doesn't act either, incidently.

 

2. In the Device manager, there's still "Other peripheral" that doesn't have a driver installed. Hardware identification number is:

PCI\VEN_8086&DEV_15D9&SUBSYS_00008086&REV_02

 

Now, I have checked very similar topic there, but this isn't the same issue. At the path described, there's nothing blocking any device installation.

 

These issues may or may not have something to do with one another.

 

Please advise

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