As Maconthemove hinted, these models have a congenital defect. The ball-grid array on the video/graphics chip tends to make poor contact with the motherboard. Instability, failure to boot, and a sensitivity to pressure on the left side of the unit are all common manifestations of this problem. The only true cure is to reflow the BGA joints. Some folks have managed a temporary workaround by jamming a number of business cards between the bottom case and the logic board, but it's definitely not a reliable fix. So, if this sounds like the problem with that iBook, I'd pass on it unless you are up for a fairly major project. Save your money for something more promising.