I've got an older G4 Quicksilver model, 2002, with the dual 1Ghz processor. I've updated to 1.5GB RAM, added a USB 2.0 PCI card, and a 160GB hard drive over it's life, and I don't use the machine for anything major, just web browsing, email, and iTunes. Currently running OS X 10.4.6. I do not rely on it for the heavy stuff some of you guys do, it's really just an internet connection for me and it does more than it's job of that, so it's a perfect computer as long as it always works. That's why I'm here. I get the infamous 'black screen' asking for a restart, at completely random times, off and on for nearly a year. Usually it's when I power it up from cold (turned off for say a long weekend) but it does it too at times when waking up from sleep. I had a guy clean it out a few months ago and he suggested it was a HD issue, hence the new one I installed. It got better and a lot of the other weird issues like not going into sleep automatically, Firefox hang ups, and other things were fixed, but I would still get the restart screen at times. Last week I had the case open and still on (I know, I'm an idiot) and when I closed the door the video card shorted to the bottom of the power supply. I bought a new one and reset the machine, works fine again but the restart screen is now even more prominent, sometimes it takes up to a dozen shutdowns before it finally comes on and stays on. Problem is no one in the Atlanta area will touch an older Mac. The Apple store here has sent me away each time I've called and once when going in, they don't seem to know a thing about old models and refuse to assist me with service, tech support, or repair. Local computer places all say it's junk and just buy a new model, but I can't afford a grand for a machine I won't even get to use to it's full potential. I'm now leaning towards either a damaged logic board or processor, as there isn't much else it could be, one of the fans went bad a while back and I replaced it, temperatures were hovering around 116 degrees and they're now maxed at 108, don't know if that was an underlying issue all along but I'd like to hear opinions of those who know more about these and even service them, or if you know of someone who would listen to (or read all this) and not laugh in my face for trying to fix such a 'dinosaur'. I just want it to work well and be able to use it daily without shutting it down several times.