Well, today I brought my 12" PowerBook (rev. A), as I always do, to school to work on homework and to surf the next wirelessly. This morning I used it in the library and it was working just fine. I did what I needed to do on it, then closed the lid and put it in its case, then into my back pack. I took it back out about an hour later, opened it up, and nothing happened. Did a forced restart, and the PB powered up fine, except there is NO video. I hear the startup sound, but nothing comes on screen. The screen doesn't power up at all. I hear the hard drive going, but nothing is on screen! Needless to say, HELP!