New to this forum. My ancient (but reliable) laptop (Dell XPS M140) has a dimmed screen that I first experienced a few months ago. I can still see the desktop but I obviously want it back to normal as I am giving this laptop to my brother. I noticed that if I gently press down on the top left hand of the screen, it brightens up. I ended up folding a piece of paper and sticking it between the LCD screen and screen frame at that top left hand corner. That kept the screen from dimming out but I want to see if I can fix before I hand it down. I read about back lights and inverters but I wasn’t sure where to start. I figured it might be a loose cable or something. Some input would greatly be appreciated.