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Why does my laptop display look dim


I have a compaq presario 2700 us, from time to time when I turn it on the screen is not as bright as it should be. It doesn't happen all the time. What would cause it and what can be done to correct it?

Is it possible or reccomended to having my laptop given a tune up?

Thank you,

Andy Waner


This question was answered on November 6, 2004. Much of the information contained herein may have changed since posting.

Display Dims When Laptop Is Unplugged from AC Power Source

Article ID : 307442

Last Review : October 29, 2001

Revision : 1.0

This article was previously published under Q307442

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When you unplug your portable computer from an AC power source so your computer is only using battery power, the display may dim


This behavior can occur when Windows XP dims the display to reduce power consumption and improve battery life Note that this only occurs if your computer's basic input/output system (BIOS) supports the alteration of the display brightness level when you are using battery power, and your computer is in Advanced Configuration Power Interface (ACPI) mode


This behavior is by design.


You cannot alter this behavior in Windows XP, but you may be able to alter this behavior in your computer's BIOS To determine if you can alter this behavior in your computer's BIOS, view the documentation that is included with your computer



• Microsoft Windows XP Home Edition

• Microsoft Windows XP Professional Edition

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Keywords: kbdisplay kbenv kbprb KB307442

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Posted by christopher of Katharine Gibbs School - New York on November 6, 2004