Sounds like the light tubes are wearing out, rather than lcd failure. I've seen on the web a procedure for replacing the fluorescent tubes (like $20 each) on clamshell iBooks. On Tue, 20 Apr 2004, Wilhelm Wanders wrote: . . . > My powerbook is running 24/7 and although the screen turns off after 3 > minutes i can already see some weaker spots on some corners ...... > well, it is now almost 3 years old ... . . .