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PowerMac G5는 Apple Corporation에서 2003년에 처음 제조한 데스크톱 컴퓨터입니다. 이 안내서는 2004년 Apple PowerMac G5 모델 번호 A1047 EMC 2061의 수리 과정을 검토합니다. 2006년에 먼저 개발자에게 그 후 소비자에게 Intel 스위치의 일환으로 판매가 중단되었습니다.

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G5 powers on, fans run at high speed, nothing else.

G5 powers on, fans run at high speed and nothing else, no chimes, video nothing. Have changed video, ram and pram battery?

Bill

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Definitely hardware related and most likely a logic board. If you don't receive more detailed responses here and/or don't feel comfortable repairing this yourself then make your way to a service center. Use this link to find one near you. The repair will likely be in the hundreds. Your data should be safe.

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Agreed +

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Hey guys,

I had a problem that sounds similar that I just solved a few minutes ago, thanks to the amazing resource that iFixit is which led me on the right track after looking at numerous questions & answers. My machine would power on, but no signal would be sent to the monitor. The fans would run, and would in fact get louder the longer I left the computer on, forcing me to ultimately have to force the G5 to shut down. I removed the memory and the video card, but didn't get a beep or any flashing from the power LED that people said I should get. I've been thinking that my power supply was faulty (given the fact that it is common among G5's), and have been reluctant to foot the $200+ bill for a new PSU. BTW, from my searches, it seems this site has the best prices (http://www.mac-pro.com/Replacement-Power... here to figure out your exact model by serial number: http://www.chipmunk.nl/klantenservice/ap...). Still, $200 bucks isn't really feasible for me. So, I'd read that resetting the PMU/SMU could be helpful. I decided to do that. I followed the basic directions on Apple's site for the process (http://support.apple.com/kb/HT1436), although they don't seem accurate. I have a June 2004 G5, and I definitely have a button as depicted (although the innards are located slightly differently), although it is labeled PMU on the circuit board. Anyway, I pushed the button, turned it on and made the mistake of forgetting to put back in the main fan set (after which the power light blinked once every 4.5 seconds, and after 30 seconds or so the fans started going crazy), shut it down, put it back together properly, powered it on, and CHIME, I hear the lovely boot sound. A little bit later the monitor powered on and everything was as normal. Don't know if this'll work for you, but it couldn't hurt to try. I'm not sure why, but I've seen it stressed that you should only press the reset button ONCE. Not sure what'd happen if you pressed 2x or held it, but a short click will work. I didn't think i'd pressed it enough, but it worked. Cheers.

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Well, as it turns out, I spoke to soon. Last night the G5 crashed with a kernel panic error message in the top-left corner of the screen. Never got one before. From then on I've been trying to get it to boot properly, but it's really hit or miss. I've restarted it several times, had it freeze once at the gray, apple symbol screen, and sound the chimes 2-3 times, but mostly it will just turn on without chimes and without any output to the monitor. I'm really wondering now if it is in fact a power issue.

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I’m having this exact issue right now, did you ever get this solved?

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