So, I messed up. I have replaced about 15 iPhone screens before and have never had any problems. This time i forgot to disconnect the battery.... i think i made a $600 mistake. The phone will not turn on with the old screen or the new screen and when i plug it in to iTunes it is not recognized. Furthermore, its not being recognized by my computer either. I tried to do a hard reset... no luck. I disconnected the battery and held down the power button for 20 seconds bc someone told me to.. no luck. I don't know what to do. Any suggestions?