My Nokia Lumia 925 won't turn on?

[Windows Central Question]

I had it charging all night yesterday and when I tried turning it on this morning, it won't turn on. I've tried holding the power button, camera button, and volume down button for 10 to 15 seconds and all kinds of different combinations to turn it back on. Help?

 

[Guytronic]

Plug the phones USB data\charging cable into a desktop and see if the phone shows up when connected.