I tried replacing my housing because my old one is chipped and now the Nokia won't turn on. Any suggestions? I didn't even get all the way:

Undid 2 body screws.
I took out the screen.
Undid 2 battery-housing screws.
Reassembled from here.

I never took out the battery or touched its connector.

Now when pressing the power button, there is no life at all. Any suggestions?