The subject pretty much says it. I'm trying to boot from the cd that came with the MacBook pro and when I do, after about a minute of the apple logo with a swirly line thing under it, the screen goes black. You can hear everything still working though. Eventually the cd stops reading and spins down. I've even let it sit for a while to see if the screen comes back on. I have to hold the power button down to turn the computer off. it's a MacBook pro 5,5. No boot camp. OS X 10.6.8 I've tried booting from cd by both hitting the option key when loading and by telling it to boot from cd in the cd's menu. Thoughts? Thanks.