Control Key has stopped functioning

Hi All,
My MBP (early 2009) 17" has just come back from apple after having the motherboard, battery and magsafe port replaced. Unfortunately the ctr key has stopped working, this is osx (10.6.5) and Windoze 7. Does it need to go back to the shop or is there some firmware or software that hasn't been installed after its replaced innards that i can sort out.
Mike

Try this, may help.
1. Reset PRAM.  http://support.apple.com/kb/PH4405
2. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
If this does not help, contact Apple.
Best.

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