View Full Version : Screen Flickering On a 667 TiBook G4

Mar 12, 2007, 12:56 AM
My 667 Powerbook G4, which I bought several years ago, has ran perfectly well up until about a year ago. At that point, my screen began doing strange things, such as the screen will flicker, and horizontal lines will appear on different parts of the screen, and can be refreshed through certain methods such as minimizing the window. Also, sometimes a checkboard of black boxes will appear over the top inch of the screen, and can't be removed unless the computer is restarted. The boxes are only on the background, so windows can go over it. I'm not sure if this problem is common or rare, but if anyone has any info on it, I'd be pleased to hear it. Thanks!

mad jew
Mar 12, 2007, 01:04 AM
Weirdness. Hopefully the GPU isn't crapping out on you. Try resetting your PMU (http://docs.info.apple.com/article.html?artnum=14449) as a start. :)

Mar 12, 2007, 01:21 AM
when you get the flickering stuff, try to move your screen back and forth to see if the culprit could be a bad ribbon cable.