Crash-tastic

Ouch. What you’re describing is a kernel panic, a cute name for a not-so-cute problem. An operating system’s kernel acts as a bridge between applications and the computer’s hardware, and kernel panics are the last-ditch efforts of the operating system to recover from serious conflicts between them. The chief causes of kernel panics are faulty RAM and software incompatible with the operating system you’re running. Unfortunately, that range could include any number of bad things that may be happening on your poor PowerBook.

Happily, even a kernel panic isn’t the end of the world, and we can offer some pointers to help you figure out what’s wrong. The first step is to look at your Mac’s history. Was there a time when it didn’t get kernel panics? Think back to any (and we mean any) new hardware or software you installed before the panics began. Update or uninstall them one item at a time to isolate the panics’ cause until you narrow down the trouble. Also note which hardware and software you’re using just before they strike--there may be a pattern. Whatever the issue, your Mac isn’t happy, so be sure to back up important files and verify your hard drive with Disk Utility regularly.