Is it possible to keep a Powerbook running with the lid closed without connecting it to an external monitor? All the webpages/threads I've found suggest you need an external monitor plugged in. For example: http://docs.info.apple.com/article.html?artnum=88064 I want to be able to ssh to my powerbook or keep downloads going while I'm away from the laptop and if I can close the lid, I don't have to worry about my cat or 3-year-old messing with it. I've tried disabling sleep mode, but that doesn't seem to override closing the lid. Edit: forgot to mention that I am plugging it in.