My friend gave me her old phone and I decided to try and root it myself. I rooted it using Odin and jeboo kernel and it said that it passed, now when I try and turn it on nothing happens. I can turn it on in download mode, a yellow yield sign comes up and then it turns off again and nothing happens. Can anyone help me make this phone work again? I'm worried my friend is going to ask for it back...I live with her. I am a complete idiot for trying to do this myself.