I have a aluminum macbook 2.4ghz and I seem to be having a problem with my iSight. It shows up fine on my computer and I also have my old PC in my room and when i video chat to that one it seems to work fine. However, it seems whenever I try to connect to anyone else they only get a black screen, does anyone know how to troubleshot this or have any suggestions. Thank you. I tried a search for this but did not find an answer and googled and found a good amount of people who had a black screen on their own mac but none with this problem.