How I can increase brightness dell laptop

[arbindsah645]

When I want to increase brightness but I did not in my dell laptop

 

[hang-the-9]

Need details about the issue, laptop model, is it dimmer than it used to be, did anything happen before the issue started? How dim is it, is it readable? No way to know what the issue is or if there is a fix outside of replacing the screen based on what you put in.