The brightness on your Dell laptop or desktop monitor can negatively affect your viewing experience when the screen is too dim. Dell laptops include automatic battery-conservation settings that dim the screen when the laptop runs on battery power alone. Using a keyboard shortcut will override the automatic settings and can be done any time. The Dell desktop LCD monitor provides function keys on the front panel for brightness and contrast adjustment. Use these keys to adjust the monitor to your specific viewing needs.
Press and hold the "Fn" key. It's located near the "Ctrl" key in the bottom-left corner of the keyboard.
Press the "Up Arrow" while holding the "Fn" key to raise the brightness level. Press the "Down Arrow" to lower the brightness.
Release the keys to save the brightness settings.
Locate and press the "-" button on the front of your monitor. This opens the Brightness/Contrast menu.
Press "+" button to scroll through the menu and press "-" to choose the Brightness control.
Press the "+" button to increase brightness and "-" to decrease brightness. The settings will automatically save.