I have this lovely - that's the only word to really describe it - 2 week old 20" iMac G5 which functions reasonably well most of the time but once in a while like this AM after it had been asleep all evening, it refused to wake from sleep. The computer seemed to come back to life but the screen remained black. Shutting the iMac down and then starting it back up seemed to revive it just fine BUT - there was no chime on at the beginning of the startup. Is this a source of concern? - the Turbo Mouse Pro trackball that I use didn't work once the iMac came back on I had to disconnect the USB from the trackball and reconnect it. This made the trackball functional again. Any comments on this weird sequence of events. The iMac is only 2 weeks old and when it first came out of the box, we had a LOT of problems with it that required quite a few sessions with the AppleCare folks. These problems were - would not start up properly from sleep or the Off state. What would happen in both instances is that the computer did start but the sreen remained off and after a minute, the fans went into a high rev noisy mode. Now most of the problems seem to be resolved but occasionally like this AM I still have to contend with this nonsense. I feel as though I may have a lemon on my hands since I expect my iMacs to function perfectly. Perhaps this is expecting too much?