Default [Q] Notification light stays red all the time SPH-L900

For some reason the red notification light turned on and stays on even when the phone is turned off. It only goes off when I remove the battery.

It stays on and is a steady red light, it does not flash red.

I've only seen the notification light flash blue when I have a missed call, text message or email, but I've never seen it turn red before and it stays red all the time.

I know the notification light shows red when the phone is charging and the screen is off, but I turned off that feature a long time ago and that feature is still off.

The red notification light was off when I put the phone on the table, but when I looked at the phone an hour later the red light was on and stays on constantly.

It's the notification light on the left side of the earpiece on the phone. This has nothing to do with the sensor or camera that are on the right side of the earpiece.

In the Sprint manual it is called the Status Light, but it is also called the Notification Light.

Has anyone else encountered this problem?

Sprint Samsung Galaxy Note 2 SPH-L900