Non functioning keys.

So, a few keys decided to die out on my macbook. Cool, no biggie. Bought a new topcase thought I'd replace the keyboard. Finished up, put everything back together but upon booting up, I find some keys are still non functioning. Most importantly the return key.

The keys not working just so happen to be a few that weren't working before the keyboard swap. 8, return, right shift. What other solution/problem is there?


EDIT:
Rad new update. The entire row of numbers isn't functioning with the exception of 0. Awesome.

having the same problem. my return key decided to leave us. if you figure it out, please post. will do the same.