Hey guys i just got my macbook 2 days ago, and today i had a problem with the power button so i took it to the mac store and they gave me a brand new one. Now today when i booted up the new mac i transfered all my data etc... but i just noticed the green light to the right of the camera is on ALL the time. How do i turn this light off? Also when i use Photobooth there is only a black screen... what is going on? Please help!