Hello all of my MacRumors friends! I've been a member here for about...hmm, maybe a month or so now. Perhaps less, but I've started posting recently. It's funny how a website can be a "home," but let's just say that I'm a college student and there are some days where I surf the forums here more than I should with the amount of HW that I have to do. Hehe. But anyway...now to the meat of the problem. I've had my G4 Quicksilver for about ...hmmm...Id guess four years? I got it brand new from apple in 2001 or 2002. Dual 1.0 GHz G4 "Quicksilver" (And oh man it's fast!! Always has been) 1 GB of PC133 SDRAM (512 is apple ram and the other 512 is Centon) 133 MHz FSB 80 GB HD (Ultra ATA I think, I'l double check later, but I'm pretty sure that's right. I'm drawing a blank for some reason) CD-RW/DVD-R SuperDrive NVIDIA GeForce4 MX (AGP 4X) video card with 64 MB of DDR SDRAM Currently Running OS 10.4.8 (but when the problems started to happen I was running 10.3.5 (It was the latest version of 10.3 at the time) It's a great computer. Like I said, really fast. Starts up in 30 seconds too, haha. I don't know how that happened because it used to take 46, but anyway, it's fast. About a year ago, in September I was having some problems where I kept getting Kernel Errors and crashes. (the kind where the shaded curtain comes down the screen and you get the "you must shut down" message in a few different languages and other times, I would get the white text down the left side of the screen with the black shading behind it saying stuf like "error 0x55CSxSGSHDSIKxHFGFK CPU 1") At this time, I had OS 10.3 on the comp, and I hadn't experienced any problems with the computer at all up until this point, so this all came as a big surprise. Also, it was the main family computer AND I was doing a video editing job at the time, so this was a really bad problem. So, my Dad and I went to the Apple Store to see what I could do to fix it. It was no longer covered under AppleCare, so we paid the $75-90 or so fee to get it looked at by the Apple Techs. After running the diagnostic software and testing it a bit (it took about 2 or 3 weeks to figure out what was going on) the guys at the store thought that there was either a hard drive or logic board problem. They said that it would cost $600 to replace either one. So we figured...hey...it's a good comp and it would be worth the $600. We wanted to wait a bit longer before upgrading to a G5. So we paid the $600 and they replaced the logic board. Then they tested it and it still crashed, so they moved onto replacing each of the 1GHz processors (and we didn't have to pay more than the $600+ "look at it" fee because they had misdiagnosed it). So they replaced the procesors and we still got kernel errors. They also reinstalled the OS a few times after this to see if it was software related, but it hadn't been. We wiped the hard drive and even DURING the install, it still crashed. Then the guys at the apple store tried replacing the hard drive itself. Still crashed. Then they tried the video card. Still crashed. There were very few things left to replace in the computer, haha. So they eventually gave us back the computer and put our $600+ dollars that we already paid toward a new G5. So in the end, we just bought a G5. But...I'm still trying to get the G4 to work because it really is a good computer. I can edit video very effectively on it when it doesn't crash. Also, I took the G4 to college so I wouldn't have to buy a new comp until Summer of 2007, so I was hoping that it would last me until then. Oh, and also, I've found that it crashed roughly 1 out of 2 times when I run it on both processors, but when I switch to only one processor, it usually only crashes 1 our of every 10 times. The biggest problem, though...is that applications quit constantly. This is the problem that affects me most. It must be related to the kernel erros and this quitting problem has only happened sinc I first got the kernel errors. Also, just to add a bit more info: Ive tried running the G4 with the CD/DVD drive disconnected and without the zip drive that we originally had in it. So basically, the only thing that hasn't been replaced is the power supply, I guess. Oh, also, we replaed the battery inside and tried resetting the pram more than once. I've also tried running the comp off of an external HD and it still crashes, so it's definitely not the HD. I do wonder if it's a heat dissipation problem because it seems to run longer (without crashing) when I leave the CPU open, but it still crashes and programs still quit. Could be the power supply too, but I think they might have tested it at the apple store that day. I'm not 100% sure, though. Oh, also, Star Wars Jedi Knight II has become unplayable on it because of the crashing. It crashes whenever I even try to conect to a server to play the game. That's just one illustration of the state of the comp. Also, Microsoft word 2004 quits A LOT too. And as one last bit of info, I'm currently Running the latest version of Mac OS: 10.4.8 (I think that's the latest) I'm currently writing this post from a PC here at my college, so I don't have the mac right next to me. Any thoughts would be greatly appreciated. I love my G4 and I hope to keep it alive for as long as possible! Thank you!