My iphone 4 was working fine this morning, nothing out of the ordinary; but when i went to check the time it wouldnt turn on. It is completely dead, and i cant try to turn it on because my lock button doesnt work. I plugged it in to the charger and nothing pops up, no green battery or anything. I even plugged it into my computer and still nothing. Is there any other way to try to get it to turn on? I think it will still work, but since i cant press my lock button im out of the luck; however, on the other hand, why did it just turn off by itself when it was fully charged. Has this happened to anybody else before and what should i do?