I was using my powerbook yesterday when it died. The screen shut off, but you could still see the last image stuck on the screen even though the backlight was off.
Even though the battery was in, the computer fully shut off when i pulled the power cord.
Now, if the battery is in and I turn it on, I get nothing except a very quiet fan noise.
If the battery is out, the optical drive spins up and the harddrive does as well, but there is no chime and the screen stays black.
I'm thinking logic board.
What do you think?