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I bought a used 2.16gHz core duo MBP that the previous owner said had keyboard problems ("a few keys don't work"). He explained

A while back I paid to have an Apple technician take a look at it. He said that the keys were bad and suggested that he disable the keyboard entirely, but stated it could be re-enabled; I assume he somehow shut it off. No liquid was ever spilled on it.

Before I can try any suggested fixes, I need to figure out how to re-enable it. Using an external USB keyboard, I tried the following:

sudo kextload /System/Library/Extensions/AppleUSBTopCase.kext/Contents/PlugIns/AppleUSBTCKeyboard.kext/

This did not re-enable the keyboard.

If I can't manage to fix it, how do I disable it again?

BTW, the internal touchpad works fine.

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2  
Are you sure it's not disconnected internally? – slhck Jun 16 '12 at 11:20
    
That was my first thought too... that it was just no longer hooked up to the logic board. – Bon Gart Jun 16 '12 at 13:26
    
Open System Information and under Hardware -> USB does it list the internal keyboard? – evan.bovie Jun 16 '12 at 14:12
    
I removed the battery and could see that the keyboard cable was plugged in. Also, system information/hardware/usb bus shows Apple Internal keyboard. – pete Jun 16 '12 at 14:29

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