I spilled water onto my macbook pro and now some of the keys don't work. I'm not really worried about that though. I have an external keyboard that I use more than the laptop's so I'm not worried about saving it or drying it out. All the water is gone but for some reason the N button is stuck electronically or something, so it is essentially wanting to type out "nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn" every second. Is there any way of disabling access to the keyboard through the terminal or something?