My mom's PowerBook just started having display oddities on the onboard display (monitor (analog) connected to the video-out port is just fine). PB G4/1.6 17" screen.
The graphics have odd color casts and look "pixellated" (don't know how else to say it). It was supposedly a rather rapid transition one night as well. The TechTool diagnostics say everything's good, but it obviously isn't.
I'm 95% sure that it's the LCD panel drivers, since I checked the panel connector cable and all wires appear connected. The bad news is that it seems rather difficult to find that panel for under $300 (I found a couple places that say they have it and then tell you they don't after placing the order that were less expensive). Since it's a bit expensive, I want to make sure it is the LCD and I also need to think about the value equation. It's been a good computer, but would a used Intel Macintosh or a "hackbook" be better?