My Nokia Lumia 521 isn't turning on...

[WPCentral Question]

it's fully charged, I just took it off the charger, but it wouldn't turn on, so I took the battery out and put it back in and it turned on for a few seconds then the screen turned black, but it made some sounds then turned off completely. I've tried that over and over, but nothing works. Please help me. I can't afford a new phone.

 

[rhapdog]

I suppose the obvious follow up questions would be, "Has the phone been dropped/damaged" and "Has the phone gotten wet?"