All of a sudden, directional down key doesn't work?

I'm on my boyfriend's macbook pro.
all of a sudden, his down key doesn't work.
all the other keys surrounding it work.
I've taken off the key to check underneath, and there is nothing stuck.
We haven't done any updates or anything.
Is there anyway to fix this? o_O
Thank you!

Is there anyway to fix this? o_O
Get a new BF with a Mac that works.
Try resetting your SMC and PRAM.
Resetting the System Management Controller >>
If that does not work, you might try an Archive and Install to eliminate a software issue, but my guess is, he may need the keyboard replaced.
-Bmer
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All of a sudden, directional down key doesn't work?

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