I have a 2008 Aluminum 13'' macbook. My cat recently knocked my laptop onto the floor from about 1.5 feet up. Afterwards, I noticed my F1 and F2 buttons do not work anymore to adjust my brightness. The rest of the F buttons work perfectly fine along with the rest of the keyboard. I remembered there were brightness controls in System Preferences under display, but they are no longer there. I can't adjust my brightness at all. How do I go about fixing this? Thanks for reading.