Well, I've got this really strange problem on my QS G4 that has me totally stumped and I've been searching all over the place and haven't seen anyone who had the same problem! I'm hoping someone can help me get oriented in the right direction here! Synopsis: At start-up, start-up tone sounds, hard drive starts spinning and then everything gets weird. No power goes to the USB ports so my keyboard and mouse don't work and the power button LED remains dark like the machine was off. Then the machine plays a continuous tone that sounds like. . . welll. . . BEEEOOOOOOOOOOOOP! It's not the series of beeps that tell you that something is screwed with your RAM or HD, etc. It's just a non-stop tone. My System: 933/QS G4 1 Gb RAM 60 Gb IBM Deskstar + 80 Gb Maxtor DiamondMax Plus Superdrive OS 10.2.6 GeForce4 MX Graphics card Details of My Ordeal: Lately I've had frequent system freezes on my computer and then subsequent start-up problems. The system will freeze doing aboslutely innocent things like moving the mouse over a dock icon. In fact, this is the way it happened a number of times. I put the pointer over iTunes or Safari (etc) and then everything freezes. Once my system freezes, I often won't be able to start-up my computer without zapping the PRAM first. Sometimes after I manage to start it up again, the computer is S-L-O-W like it suddenly was channeling the spirit of my old Quadra. I thought my HD was dying so I bought a new one, which from what I understand is known for the infamous two beeps issue, but that's not the same thing as what I'm going through. The new HD seemed to help, but now I think it only delayed the inevitable. Then the same problems started happening again. It just froze again and this time I can't get it to start-up again even after zapping the PRAM. There are two very peculiar things that happen when I try to start-up. 1) I hear the start-up tone, the hard drive starts spinning, but the power button LED doesn't light up and no power is going to my keyboard or mouse. 2) Then my Mac plays a continuous beeeeeeeeping tone that doesn't stop or break until I turn it off. What I've tried: - Removing my RAM to use only one of my Three PC133 DIMMs at a time - Switching Slave and Master configs on my HDs. Using either my new or old HD in the Master config. - Booting from an external CD-ROM drive...useless, it doesn't even try to access it. - Replaced my PRAM battery. -------------- I'm stumped! Does this sound familiar to anyone!