Hi, I have a problem with the a Macbook Core Duo 1.83Mhz 13.3" screen. I was installing the Snow Leopard, and after an update, the screen went black. For this update the macbook restart, appears the Apple logo and a progress bar, after that..... black screen. I try to reset all the posible things and nothing. I can connect with a vcn connection and all seem to work except the brightness buttons. The camera is working too. Any idea? Thanks.