Windows 10: No brightness adjust slider on laptop

So it's a weird one. Ideally I'd like to fix this.

Things to know:

1. The laptop had a screen replacement.
2. It's a Lenovo ThinkPad T450
3. Windows 10 Version 2004
4. Bought off eBay

I bought it as a laptop for university and discovered that the brightness was stuck at 100%. When i went to turn it down I found out that there was no option anywhere in windows to reduce screen brightness.

I'd reinstalled windows 3 times. Checked every option in settings for brightness and display.

Under device manager the display is named "generic PnP display" rather than LCD.

Does anyone have any ideas or suggestions? Should I rollback to a previous version of windows? Are there any specific drivers I should install?

in short, it behaves as if it were a desktop with an external monitor. You cannot adjust brightness through windows.

Thanks everyone.

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:)

 

Missing Adjust Screen Brightness slider in Power Options

My HP laptop performed a Windows Update today. As a result, I've lost my "Adjust Screen Brightness" slider in Power Options. I can still find it in Settings - Display.

I have Win 10. I've found a YouTube video (specifically for Win 7) that suggests going to Device Manager - Monitors - Properties - Uninstall Device, but I've also read that doing so will merely result in the same driver being reinstalled.

What should I do to get the "Adjust Screen Brightness" slider back in Power Options?

Thanks so much for your help.

 

No option or slider to adjust Brightness ?

Brightness sliders are only in !all in ones", like laptops, and tablets I believe.

 

Missing Adjust Screen Brightness slider in Power Options

This is how 1809 is. Settings are moving from the Control Panel.

There are plenty of other ways of adjusting brightness- could you clarify which isn't working for you?