Why doesn't my back button and home on my Note 4 light up?

[AC Question]

back button and home on my note 4 does not light up

The back button on bottom rt of my note 4 and the home on bottom left stopped lighting up can you help?

 

[B. Diddy]

Re: back button and home on my note 4 does not light up

Welcome to Android Central! Do you have any screen dimming apps installed? Some of those will also turn off the capacitative button backlights.