TAKE THE ADVICE IN THIS POST AT YOUR OWN RISK. I don't know if it's been said before, but you can take the battery cover off a DS Lite and two of the screws below the battery adjust the two screens. The hole second from right adjusts the bottom screen. I loosened it and it made the screen go grayish in hue. Tightening it makes it normal again. I don't know which one does the top screen. I know you're supposed to keep metal away from one of the holes or you'll short out your DS (before slot-1 cards, you did this to flash the DS). I was trying to fix a top screen issue I had posted a few weeks ago, but didn't want to tamper anymore in fear of bricking my DS. My issue was a slight flickering like old CRT monitors and vertical scanlines on certain colors. Which screw adjusts the top screen? It's not the triangular one is it? I didn't have a triangular screwdriver so I couldn't get it to unscrew. Also, is there a danger of doing this?