OK, my iBook is doing the same thing I had reported my PowerBook as doing about two weeks ago, only it does it all the time. The screen gets really dark like the contrast is all the way down, but you can still kinda make out the screen. I'm guessing this is a logicboard failure, and that I need to replace this part. I'm wondering if anybody here has replaced the logicboard on a G3 iBook, and if you consider it excessively hard. I have a lot of experience on desktops, but haven't really tried to take apart the iBook. Is it doable?