wayne:
Welcome to Apple Discussions.
Your computer is experiencing what is known as
a kernel panic. These are either hardware or software induced. In terms of hardware the most common offenders are RAM and the Airport Extreme card. If you have recently installed new RAM, remove the module you installed and try booting again. If not, you might try removing the Airport Extreme card and try booting. If you are able to boot without the AE card, clead the contacts with a clean, lint-free cloth and replace the card making sure it is securely in place. If neither of these are producting, boot the computer from the Apple Hardware Test disk that came with your computer and the extended tests in a loop (hold down Control + L during the tests). Let it run for several cycles as it sometimes takes hours for intermittent issues to surface. Please let us know how it goes. If you are able to locate the crash log, please post the last occurence when you post back. See Dr. Smoke's FAQ
Resolving Kernel Panics for more info.
When you respond, please include more info about your computer including Processor speed, Hard Disk Drive capacity, available capacity, RAM installed and the OS you have installed.
😉 cornelius