I have an HP dv6129us laptop. The brightness is sufficient but cannot be changed upwards or downwards. I have used the fn-f7 and fn-f8 keys combination and also searched in the Contol Panel / Display / Properties icon. Do I have a hardware problem?
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Below are instructions to adjust brightness on HP laptop
Press the "Fn" key with the computer turned on and hold the key.
Press the "F7" or "F8" key on some HP laptops, which are
printed with a small sun icon on the key. The sun icon is filled on the
function key for dimming the laptop. The other key is printed with a
hollow sun icon for brightening the screen.
Press the "Fn" and left arrow keys together on some HP
laptops to turn down the brightness. The "Fn" and right arrow key will
increase brightness. Press and release the right arrow key repeatedly,
while holding down "Fn," to decrease the screen brightness slowly, or
hold the keys to darken the screen as low as the setting will go.
For HP Monitors
Press and hold the down arrow key on the front panel of the
monitor below the screen to turn down the brightness on the external
monitor to the lowest setting.
Repeatedly press the down arrow button to dim the monitor gradually.
Press the up arrow key on the monitor to increase brightness.
the problem is that its set in the power saving options. i mean on battery its set to power saver . while on power adapter it changes to hp recomended or high perfomance. So if you want to change it go to the right bottom of your screen and click the battery symbol it should give you the option to 1> change screen brightness 2>more power options. Go to more power options and select "change plan settings" beside the power saver.(not the one beside the other options) and change ur brightness. but its always better to keep it at ur minimum(with what ur comfortable) as its helpful to save battery
If your HP laptop has a dull screen, or if the screen is too bright to make out anything that's displayed, you may need to adjust the brightness to get your screen back the way you like it. You don't want to strain your eyes to see your screen, and the fix is really simple. It's about as easy as adjusting the brightness on a TV. You'll have your brightness set the way you want it in a few seconds.
1. Right-click on an empty space on the desktop and a drop-down menu will appear. 2. Click on "Properties." If the HP laptop uses Windows Vista, you'll click on "Personalize." 3. On the "Personalize appearance and sounds" screen, click on "Window Color and Appearance." 4. Click on the arrow beside "Show color mixer." 5. Use your mouse pointer to move the tab on the "Brightness" scale to the left or the right to adjust the brightness and click on "OK" when you're content with the color.
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go to the search icon under start. search brightness. it will tell you step by step what to do.
Every laptop is different, so adjusting the brightness or contrast on your laptop may vary from the steps provided on this page. However, understanding the process of how to adjust the brightness or contrast will help you change your settings.
Most laptops adjust their brightness and other settings using the function key in conjunction with another key. For example, pressing and holding the function key (abbreviated as "Fn") and pressing the up or down arrow keys as shown in the picture below, increases and decreases the brightness.
Do the following
To adjust the LCD brightness press the Fn + (Up) key combination or the Fn + (Down) key combination.
The changed screen brightness is displayed at the center of the screen for a moment.
1. Turn the computer on and press the F2 key when the SAMSUNG logo appears on the screen to enter the BIOS Setup.
2. Select the Boot menu and set the Brightness Mode Control item to User Control.
3. Press the F10 key to save the settings and exit Setup.
The screen brightness may be too low. That may happen in certain power regimes ( when used on battery power, presentation, etc.) Here is how to change screen brightness on a Toshiba satellite that has the Toshiba Power saver software installed
Go to the Control panel, Click Toshiba Power Saver ( icon has two hands praying?) and increase the screen brightness. in each of the different regimes provided : Full power, High Power, Normal, DVD Playback and so on.
Actually it's the F5 key which also has a symbol of the sun on it and arrow pointing upward. Press the blue Fn key located at the bottom row, 2nd from the left and the F5 key together to increase brightness or the F4 key to decrease the brightness (it has an arrow pointing downward). Easy, eh?
Right click on the battery icon in the taskbar, go to Power Options or something similiar. Change the plan settings for the power plan you're currently in. Check the brightness ratio for both battery and plugged in mode. This problem might come if you or someone had tinkered with the settings.