Hey guys, I have a 3 year old Macbook that has been running perfectly until today. Today while browsing, the screen just turned black so I held down the power button to restart it. When it booted up again, it only lasted probably a minute or 2 and then it restarted by itself. Now when I boot my computer up, it does not even go to the login screen. I can hear the drives spinning and there is battery left. I have not experimented with putting in the Leopard boot disk yet. By the way, I installed a new harddrive and some ram that was not from apple. I dunno if this makes a difference but I just thought I'd add that. I have done many searches and have not found anything similiar to this nature. Thank you in advanced.