Why is my Lumia 630 NOT turning on or even vibrate

[BeAStarBeatbox]

I was trying to open whatsapp and it couldnt open then i kept on trying on the 6th attempt the screen went black. I tried soft, hard reset and yes the battery was full when this happened.
Also when i connect it to my laptop it wont be recognized and there is no change.
please help

 

[abhishek singh21]

connect the phone to the charger and check if it comes to life or shows some error or image.