I have an 15 PowerBook 1.67 with 1 gig ram. I got it on March 1st this year. Since then Ive had it at school, work and home. Primarily home of course. Usually its plugged into the external power source. Every so often Ill unplug it and let it drain so I can keep the battery as conditioned as possible. This may have been the wrong thing to do, but Ive done it. Using an external display I will have the PowerBook lid shut. Ill unplug it from the PowerBook and itll just keep working of course. I can put the PowerBook to sleep using a shortcut (apple, option, eject) on my keyboard and then wake again by press of any key on the keyboard or move of the mouse. Last night my PowerBook was registering at 95% power---plugged in. The plug was green. I had not run it down for nearly 2 weeks. I thought it was time, so I unplugged itwhile on (using an external display). The mouse disappeared and then suddenly went to sleep. I moved the mouse, pressed every key on the keyboard---nothing. Worried, I plugged it back in and rebooted. Tried everything againsame issues. Then I shut down and booted. Same thing. To reboot of course I had opened the lid and powered up. Having the external display on, I then unplugged it from its power source and then shut the lid. Nothing would wake this thing and the monitor would go to sleep as well (like the other times). In short, while using the PowerBook I could unplug it from the wall while on and continue to work. Now, it puts itself to sleep and wont wake up unless I give it external power again. I am not sure whats up. Is this a problem for Apple to look at?