Computer wont recognize iPhone 3GS

I was wondering if you guys would be able to guide me in the right direction to fixing my iPhone 32gb 3gs. First off ill start by saying what happened to it and what the problem is now. So first off it got thrown at the ground causing the touch screen, digitzer,and the frame. I ordered those parts and had the iPhone working fine, or so i thought. I couldnt get the speaker on the top of the phone to work so i took it apart a few times hoping it was just the number 3 ribbon lose, after having no look i took it apart one last time to try and when i had it back together it wouldnt get any service unless i had the phone on my truck cell booster. So i tried doing a full restart to factory to see if it would change anything. After doing that no computers will recongzine that the iPhone is plug into it, but yet when the phone is off and i plug it into the computer or the wall it turns itself one and goes to the startup screen asking to plug into itunes. So i figured it must have something to do with the internal charger so i ordered a new bottom piece to see i that was the problem, and still my computer will not recongzine my iPhone, nor will the other computers in the house. When i opened it up to make sure everything was connect i noticed that the spot where the number 7 ribbon was bent on one side so i used a small flat head to make it a circle again but that didnt seems to help any. So is there anything you can thing to do