Pressing the scroll lock key will turn it off. The key toggles between off/on.
Today I noticed that there is a light on, on my keyboard. It's NOT the Number Lock or Caps Lock. I looked into it and found out it's the Scroll Lock. I went through the diagnostics on my system (and keyboard), since they're still under warranty. It says that there is an "Aggregate Keyboard"  Failure, and I had the choice of them sending me a new part to replace.  What causes this? Is there something I can do NOW to turn that light off? Thanks for any help you can give me.  
KEYBOARD LIGHT STUCK ON