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Re: used Compaq Laptop screen not bright
Usually most laptops has blue/white function keys top on keyboard they can be used together with Fn button that is left bottom side of keyboard. For example on my laptop with F4 and F5 together with Fn can adjust brightness.
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Laptop screen is normally brighter when it is connected to the charge adapter. When the laptop is running on the battery it is usually a little dimmer to save battery power, you can adjust the screen brightness even on battery power. To adjust the brightness hold down the Fn key and press one of the function button keys it maybe the F7 or F8 key it will have a symbol on the key to indicate the screen brightness.
Right click the battery icon next to the clock on your taskbar. Select "Power Options" At the bottom, there is a slider for screen brightness. Slide it left to dim, slide right for brighter. If you want your laptop to automatically adjust the brightness based on whether it's plugged in or not, click "Change plan settings" next to the currently selected power plan (usually Balanced). On the new screen, there are 2 sliders. I would recommend setting the Plugged In slider to max and the On Battery slider to about 1/2 to begin with. Then adjust them to personal preference.
Decrease Brightness (fn+f7) The fn+f7 hotkey decreases the brightness of the notebook screen. The longer you hold down the fn+f7 hotkey, the more the screen dims. Decreasing screen brightness conserves power.» To increase screen brightness, press the fn+f8hotkey.
Increase Brightness (fn+f8)The fn+f8 hotkey increases the brightness of the notebook screen. The longer you hold down the fn+f8 hotkey, the more the screen brightens.» To decrease screen brightness, press the fn+f7hotkey.
press and hold the "blue" "fn" button (buttom left, second from left), as you press the F10 button and again untill you have the brightness you want.
But be avare, you use more power this way, whitch will result in shorter battery time.
Its not a problem, its how it was designed. With the power cord in it will be at full power so it will light brighter, When the power cord is out, it will be less bright as its using power from the battery , it will light dimmer to conserve power.