I've had this computer since 2016. In all the time I've had it, the lights illuminating from my chassis were blue until the last 12 hours. Now they're green. What does it mean and should I be worried? What is the exact name of those lights and do the Theater-Lighting Batteries control those lights or is this a Top Lighting Board thing? I used to know, but forgot. The owner's manual doesn't show or say much about those lights.

The user's manual won't show anything, because Flash Player was discontinued.