I cracked the screen of my iPod 4th gen, and bought a replacement kit to replace it. I replaced it, and before applying adhesive, I checked to see it work. It worked fine, it was responsive, etc. But I couldn't close the case because the digitizer extended to the top part of the screen, and needed to be put into place. While doing that, the screen attachment came off -- while the screen was still on, and it went pitch black. Now it does not respond to anything. It's not recognized by the computer and iTunes either. What could have happened? Could it be fixed after this point?
Edit: connecting to power does not turn it on either.