My iphone 4 won't turn back on?

Yesterday, when I woke up my iphone wouldn't turn on. Naturally, I thought it was dead but I been charging it for over a day. When I was sleeping the other night, it was working and I was ignoring phone calls through out my sleep. I even tried a different charger. What could possibly be wrong?

The charger thing inside the phone could of got ditached happens when you move the phone while moving it you might need a new phone

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