I had the same problem. Took the phone apart again and I had the black piece from the battery on the leads wrong. I had to make sure I carefully put the little piece between battery & mother board, then put the leads on the board. Phone works again! Awesome! I praise God for helping me understand what I had done wrong. I hope I explained it well. Hm, the little piece that is attached to the battery with the leads on it-at first I was just placing it on the motherboard, what happened is the little piece of plastic was covering the leads, so motherboard could not read it. I took the little flap & unfolded it off the leads then put that down between the battery & motherboard & then the area with the leads laid on the motherboard and viola, the phone works with new battery! Yea!