Default No power after repair

Hi, I bought a G2 (Verizon model) off eBay with a cracked screen. When it arrived I plugged it in to see if it would boot, it had a red LED come on and windows made a USB noise but nothing was displayed on the screen. I waited a few minutes and tried to turn it on. It said it was on 4% battery and not enough power to boot. Fair enough, seems to be working. I unplugged it and took it apart then transplanted the parts into a new LCD I got from aliexpress. Was a pain in the ass, that glue and tape is tough to fight with but I finally managed to wrangle free all the parts and get them over.

Put the phone back together and now when I plug in the USB cable there is no LED and no USB noise. I'm sure I plugged all of the parts back in. I don't know what a part at the bottom near the charger is though, could it be as simple as this part being responsible?

Here is an album of my phone if anyone can spot anything I missed

http://imgur.com/a/7GXGM