Backlight Problem after Display Replacement

I recently replaced the battery and display on my daughter's Nano 5g after it went through the wash. The battery was tricky with the solder points being so close, but I was able to get it connected.

I replaced the display as well, since the backlight was not coming on. Unfortunately, the new display is doing the same thing. I can see the menus faintly and it plays music fine, but I was hoping to get the display working again.

From what I can tell, the display only connects to the mainboard in one place, that is to say there are no other contact points I am missing? The only other suspicious thing is that I had a very tiny spring pop out when I disassembled the nano and I cannot determine where it came from. I cannot find any reference to a spring in any of the teardown guides that I found on the web.

Any suggestions that might help.

I have tried resetting the ipod as well as changing the backlight options in settings with no luck. Could the backlight controller on the mainboard be fried?