Yesterday I tripped on a wire, causing my Macbook Pro to fall to the ground. Now there is a small dent in the aluminum frame, in the left corner nearest to the charger cable plug. When I picked it up, the screen was not working correctly and was unresponsive to the track pad. When I tried to restart it, my computer simply beeped three times repeatedly. Since the screen isn't cracked, what exactly was damaged? Can my computer be repaired, and at what cost might this be?