I believe it is how often it was opened/closed that would have caused the problem, not how long it was on...and, I have one too smack in the middle! Pat On Sunday, April 25, 2004, at 06:49 PM, Jean-Paul Thuot wrote: > It has been a concern of mine since I bought this iBook (which is a > 600mhz, but the serial is smack dab in the middle of the range of > affected serials). I've had it for a couple of months now with no > troubles, and before I bought it it was a demo and therefore powered > on at least 18 hours a day for who knows how long?