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If you haven't done so already, double check your connections.
Do the icons and menu display?
It is possible the new LCD is defective. This has happened before. However, it's more likely there is a problem with the LCD driver on the circuit board. Your best bet is to send it to Nikon for repair or replace it all together. It's a nice, compact camera, but there are hundreds of models to choose from. Besides, I believe Nikon has a trade-in only policy on this model.
That's the problem with impact damage. It can knock components loose on the circuit board and there are hundreds of them that can cause this problem.