Why is the white light on my moto g 2 pulsing when i turn off my phone?

[Roma Joshi1]

The home button and exit app button are unresponsive. I'm not receiving notifications, and this all happened one day when my phone randomly restarted. Now the white pulses when my phone is turned off even if my phone is fully charged.

 

[B. Diddy]

Welcome to Android Central! What happens if you press and hold Power for about 15 seconds? Does the light turn off, or does the screen turn on?