Iphone doesn't work or turn on?

Iphone 4 doesn't work/turn on when its not plugged into a charger… When it is plugged in works fine… I did drop it and its cracked… What's the problem? And how can i fix it? How much would it cost me?

Iphone 4. Hmm. I bet the warranty is invalid now?

take it to an electronics repair center.

it's not cheap but it could be worth it. No idea how much non-apple repair costs.