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Guidelines
Troubleshooting black screen issues on HP Notebooks: Click here to view the instructions!
HP Recommended
HP ProBook 455 G8 Notebook PC (1Y9H2AV)
Microsoft Windows 11

I lost option to manipulate brightness of the screen. I can't do it by brightness keys on F2 F3 and inside Windows. I can't change anything. I had one strange restart of the laptop once during a day when I left for couple minutes and since then it appears. This is so frustrating and apart from brightness all other keys work well. I have the latest update of Win11. My laptop is still on guarantee.

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