Hello AGAIN, I recently purchased a sort of beat up 1.5GHz 12" PowerBook G4, top of the line, and it arrived today. It boots up normally when the apple appears, then it shows the blue screen and then the mouse turns into a spinning wheel. Also, when I move the cursor, a second cursor from the same spot stays in the top-left corner. The PowerBook will only work normally as a headless server (powers on, lid closed), unless booted in safe mode. Another issue is the screen. The seller said there were lines going up and down the screen, but it varies depending on what is displayed on the screen. If the screen is grey or in target-disk mode, they do not appear, but on the 10.5 standard desktop pic, it changes pattern. The lines can be seen here: http://www.metronomadic.com/IMG_6843.jpg It may be related to a motherboard issue.... What can I do?