Hi ! my lap top model is DELL Inspiron N5010. I Am facing problem Adjusting brightness and contrast of my Laptop With Fn+Brightnes Kay. So Plz guide me how do change brightness anc contrast?

To replace the CMOS battery, you need to remove the system board.

https://www.dell.com/community/General/Inspiron-15R-N5010-CMOS-RTC-battery-replacement/m-p/4442121

From this web site:
http://www.computerhope.com/issues/ch000594.htm
How do I adjust my brightness or contrast on my laptop? 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.

Other examples also shown in the above picture include pressing Fn and F1 and F2 or F7 and F8 to increase and decrease the brightness. If none of the above examples resemble your keyboard look for keys on the keyboard that have pictures of a sun or a half moon to identify the correct key to adjust the brightness.
How can I adjust the laptop contrast? Laptops only allow users to adjust the brightness of their screen. Contrast settings are not adjustable on a laptop display.
How do I save the new adjusted settings? After adjusting your laptops brightness it will retain the new settings.
Laptop brightness is still not enough or screen is black If after following the above steps your brightness is still not enough, plug your laptop into the wall to make sure it is not a power setting that is decreasing the brightness. If the laptop is plugged in but still is not bright enough, try the suggestions on the below link.

• My laptop computer screen is black.

I HAVE DELL INSPIRON N5010 I WANT BOOTING PASSWORD SERVICE TAG IS :FKLS4P1

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The default behaviour of the Fn Key of Dell Inspiron n5010 is as Multimedia Controls, which can be changed from the BIOS by setting the behaviour of the FN Key as Function.
To do so: -
1. Restart the laptop and Press F2 to enter into BIOS Settings.
2. Locate Fn Key option and set it for Functions


Hope it helps! Good Luck!
CreativeTECH

Hi there,

Try doing it in the BIOS environment.

-To enter the BIOS environment Tap F2 while on the DELL splash screen after turning the computer on
-A BIOS update might work but do it with a DELL representative so that whatever may happen they would know immediately
-If the behavior is the same it might be a good idea to send the laptop to them because either the buttons are stuck or there's something wrong with the controller of the brightness and contrast

Hope this helps!

There should be brightness controls on the keyboard. Look for a key with the image of a 'sun' or 'light' symbol.

Hi Dear here is the collection of N5010 XP Drivers you can havit here. If it works fine say thanks for us.

Link:
http://www.a2zdrivers.co.cc/2011/04/dell-inspiron-n5010-xp-drivers.html

Find the "service tag" code on the back of the laptop, search dell website for drivers for which it will ask for the code. This will load all available drivers for download.

Hold down the Fn key and press the up arrow several times until it tops out. By default, if you are running on battery power, it dims the display to conserve power.