That old 24" screen with the broken backlight may never be your main monitor again, but that doesn't mean you can't have a little fun with it:
Remove the backlight and frame, and you're left with a light and thin sheet that blends in with your surroundings, using available ambient light. When you're not using it, it just becomes a tinted window.
Sadly it didn't work quite as well on this laptop, due to the surface area of electronics behind the screen. It'd work much better on more recent models, but I don't have any I'm willing to sacrifice to the cause just yet.