why wont my phone charge or turn on after yellow light comes on in the back

[AC Question]

on my lg flex 2 a light came on on the back that was yellow untill m phone died now my phone wont turn on or charge whats wrong with it

 

[Javier P]

Welcome to the forums! Have you already tried replacing the battery for a new one?

 

[B. Diddy]

Welcome to Android Central! Leave it plugged into a wall outlet overnight undisturbed, then press and hold Power for at least 10-15 seconds.