Is this about the Apple Cinema Display, 1600x1024, DVI? All Apple says is: "For best results, allow the display to warm up for 30 minutes to reach peak color quality. When displaying a large area of a single color, the color might not appear uniform throughout the area. This symptom can occur if the display has not warmed up."
If there's a real problem with the backlight, the power LED will flash: "Power light flashes amber in repeating sequence of two short flashes and one long flash. This symptom indicates a problem with the backlights." With 17" displays, it often happens that one or more of the flyback transformers fail, which results in the top or bottom half of the screen being slightly darker, and the power light flashing as described above. I don't know how the backlights are positioned in your screen, but if it's just one corner and the power LED is not flashing, I'd have to guess: maybe the backlight itself is getting old. I hope someone else in here can help you more... -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list