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Windows 7: Notebook display brightness low when plugging out power cable?

11 Jun 2013   #1

win7pro 64bit
Notebook display brightness low when plugging out power cable?

As long as the power cable is plugged in in my notebook the brightness of my display is fine.

But when I plug it out and use the battery the brightness becomes suddenly darker.


How can I prevent this switch-to-dark-screen?

I found no corresponding option in the power plans


My System SpecsSystem Spec
11 Jun 2013   #2

Microsoft Community Contributor Award Recipient

Win 7 Pro x64 / Win 10 Pro

Try going to the Power options and then click Change plan settings for your power plan then in the next window under battery at the bottom is a adjustment for brightness. Be sure to save changes one done.

Notebook display brightness low when plugging out power cable?-power-options.png

Notebook display brightness low when plugging out power cable?-edit-plan-settings.png

My System SpecsSystem Spec
11 Jun 2013   #3

Win 7 Pro 64-bit 7601

Most laptops remember display brightness with power plugged and brightness when on battery, and switch setting depending on conditions.

So, when display is darker just raise the brightness, and it should remember that in the future.
My System SpecsSystem Spec

11 Jun 2013   #4

windows 7 home 64bit

Hi there .... Most Laptops have function keys to adjust the brightness Press Fn + ... Hope that helps
My System SpecsSystem Spec

 Notebook display brightness low when plugging out power cable?

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