Why doesn't my back button and folder button work or light up?

[AC Question]

why don't my back button and folder button work or light up???

I don't actually know what has caused this or how it happened. It's driving me mad.... how can I fix this before it ends up down the street!!!!

 

[gabriellarennie313]

Re: why don't my back button and folder button work or light up???

I've tried to reset phone. Checking settings. What can I do now?

 

[onnad]

Re: why don't my back button and folder button work or light up???

what device are you using?