Hi folks, I'm running Leopard 10.5.8 on my MacBook Pro 3,1 and recently I've started to have issues where, after the initial screen on startup with the circle loading image, the screen goes completely black at the point where the desktop normally starts to load. The computer continues to load though, it's just you can't see it: I press the sound buttons and the volume changes. If I then start from DVD the screen will reappear, but if I go back again to restart from the Hard Drive I have the same problem again. I have found that if I disconnect from mains and remove the battery this will often resolve the problem for a time. I usually find that it starts doing this when the computer has been left off for a time. I haven't had the problem when it's been an immediate restart when it's already on. In a nutshell, do you think it's software or is my Graphics Card on the way out? Thanks for your thoughts.