Brightness function keys not working on my Dell XPS 17 laptop

Hi RaghavendraDell,

Please follow the link below. When the page comes up please put in the service tag of your computer.
Then go ahead and download the drivers, after selecting the operating system installed on your computer, from the link below. Install it in sequence given below the link.

http://dell.to/uIo3ef

1. BIOS
2. Dell Quickset (Refer to ‘Application’ section)

Also, there are two models under Dell XPS 17 one is ‘XPS L701X’ and the other ‘XPS L702X’.If your system is ‘XPS L702X’ model to alter the settings you will have to follow the below given steps.

1. Press < Fn >< F4 > to decrease the brightness of the display.
2. Press < Fn >< F5 > to increase the brightness of the display.
3. Press < Fn >< F11 > to decrease the volume level.
4. Press < Fn >< F12 > to increase the volume level.

If your system is ‘XPS L701X’ model to alter the settings you will have to follow the below given steps.

1. Press F4 to decrease the brightness of the display.
2. Press F5 to increase the brightness of the display.
3. Press F8 to decrease the volume level.
4. Press F9 to increase the volume level.

 Please let me know if this helps.

Hi Ravi,

I have the Dell XPX17 L702X and i'm facing exactly the same problem.

I have followed your instructions - downloaded and setup the lates BIOS and Quickset, restarted my laptop and still the monitor brightness buttons (< Fn >< F4 > and < Fn >< F5 >) do not work. 

When i realised that i can't setup the brightness it was set to its maximum value somehow.

All other function buttons work properly.

Is there any other solution to this problem? 

Thanks

Christos 

I also have the same problem as Christos.

The brightness is maximum and very hard to work.

I have the Dell XPX17 L702X.

Your solutions / ideas would be highly appreciated.

Emil

Finally, after so much time, i have the solution (with the valuable help of an i.t. colleague).

Go to device manager, uninstall the monitor, scan for changes, install the proposed PnP Generic monitor driver.

Funcion keys F4 and F5 now work.

Then, go to Dell's Drivers & Downloads site and download/install the Dell S2230MX Monitor Driver.

Everything now is working flawlessly :-)

Thanks you so much for this fix!

I've been stuck on full brightness for at least a year!

Thanks!!!!!!!!!!!!!!!!!!!!!!!!