In August I ordered a new PB G4 1GHz 17" to replace my Pismo (still going strong running OS X). On delivery day I set it up only to have no startup tone, no gray Apple, no whirring HD... Dead! I calmly checked all connections, removed the battery, re-seated it, Nada. The glowing ring on the power adapter was pulsing amber...curious...the manual stated it should be amber when charging, but said nothing about pulsing... Called Apple Care and went through the procedure; reset Pram, reset PMU, Zip. They had no comment about the pulsing light. The solution; bring it to an Apple service center. At the service center they tell me they have to send it to Apple!!! (they didn't but that's another story) The bottom line? Bad AC adapter right out of the box. The tiny white cord is flimsy, the Adapter itself is poorly balanced for plugging in a wall socket, the detachable AC cord is more robust, but the little white socket protector is waiting to be lost. some concentric ribs on the plug to the PB would be nice as that slick white plastic doesn't facilitate easy removal (please don't pull on the cord). IMHO this is the weakest power adapter Apple has used.