Inspiron 15 5547 power button light

Can someone tell me for sure that the LED on the power button is supposed to light up?  I swear mine worked.  I sent it to Dell to have the hinge problem fixed, which I see a lot of you had issues with.  Well, when I got it back the light no longer comes on.  Dell is trying to say it never came on.  That this model doesn't have a light.  I said, why does it have the rectangle clear lens for a light?  They just keep saying it doesn't have one.  They said they would send a copy of specs that show this.  Never did.  I have several people that agree with me.  But, looking for more support to confront Dell.