Powerbook G4 Display Issues
I have a Powerbook G4 1.67 Ghz that has been having intermittent display problems. The powerbook is running OS 10.5.
The display produces a banding effect that comes and goes - more often than not the monitor is banding.
When the computer is powering up the gray Apple loading screen with the spinning wheel displays fine. The blue screen right before the desktop appears displays fine. Once the desktop apears the banding effect begins. Sometimes it comes and goes.
You can still use the mouse if you can locate the part of the screen you would like to click on. If I hook up an external monitor to the powerbook - the external display displays fine.
If I startup from the OS Disks - they display works fine. When I run the hardware test from the CD - it works and displays fine. Hardware test doesn't report problems.
I've linked two photos of the screen. The first photo shows the screen when it not operating properly. The second photo shows the same screen when working okay.
Bad Screen
http://www.flickr.com/photos/37089869@N03/5749752734/in/photostream
Good Screen
http://www.flickr.com/photos/37089869@N03/5749752734/in/photostream
Does anybody have any expeience troubleshooting this issue? Any help is appreciated.