Ok... I was working on my Mac Pro with my 17" MBP beside me, the MBP started to download the lastest system update. After the restart... nothing. It didn't start up any more. There is a problem with the Nvidia update I believe and the 2.4 17" MBP, there is an article about it but any of the possible solutions didn't work. I sent the MBP today to the Apple service but... I have to pay for the service!!! even still under warranty and is Apple fault I have to pay for it. It sucks!