Hello Leith, I have no 'principled' advice on this one as there appears to be so many 'causes' - often unknown - of this issue. I do not know what diagnostics were run on your machine but I am assuming that there are no bad blocks on your drive and you do not need to zero it. In the quick and dirty tricks department you might try the following (if you already haven't) First, resent the PMU. See how that works (it may only work for awhile) If that helps a bit, but the problem returns, then in System Preferences, make sure the screen saver is set to come on before the screen is set to go to sleep. Also that the disk goes to sleep after the screen does. This has helped a few people in the past who work with the AGP Graphics Tower. I don't know why. I wish you the best of luck with this frustrating problem. Alan Pomfret On 7-Aug-07, at 1:20 AM, Leith Peterson wrote: > I'm having strange problems again with my G4 AGP Graphics tower, > running 10.3.9. You may remember it was failing at boot up, right > after it chimed. I zapped the pram, as suggested, and that helped > for awhile, but then the problem happened again. > > I took it in for repair. They ran some diagnostics, and couldn't > find anything wrong, except they thought the battery might be > failing, and it was replaced. It was fine again for awhile, but now > the problem is occurring once more. This time there's a new twist. > > When I try to zap the pram, it doesn't zap. In other words, I don't > hear the chime, and I get a message as it goes to File Vault "safe > boot." There is no sound, and I can't adjust the sound either. The > sound options are dimmed. I couldn't find any information on "safe > boot." However, I can enter my password as usual in File Vault. I > haven't tried messing around with any of the other System > Preferences, as I thought I'd get your opinion before I proceed much > farther, fearing it might fail altogether at any moment. > > Please advise. Thanks, > > Leith > ----------------------------------------------------------- > For information about MUGLO: http://www.freewebs.com/muglo > ----------------------------------------------------------- ----------------------------------------------------------- For information about MUGLO: http://www.freewebs.com/muglo -----------------------------------------------------------