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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 won't boot with video card.

Hi all,

So the other day I came home to find my powermac g5 frozen with the fans going crazy. After a hard reset the machine would no longer boot any further than the grey apple (kernel) stage. After pulling the video card the machine would boot up and I could log in using remote desktop from my laptop.

The machine ran that way for a couple of days until I got a new video card. When I put the new video card in the machine would not boot again.(The new card is exactly the same one as the old one)(ATI Radeon X800 XT mac edition).

After pulling the card the machine still wouldn't boot (exact same behavior as with the card) until I let it sit unplugged for 20 minutes or so. Also when it's not booting I can see that a little red light comes on on the logic board behind the cpu's.

Anyways I'm thinking it may be a power supply issue but if any experts wanna help me out with some advice I'd be very grateful.

Thanks in advance,

Cory

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Will it boot in target mode (firewire cable to the laptop and holding the "T" key on the Pro)?

Well Today I tried using a pci video card from a g5 xserve and it exhibited the same behavior so now I know it's not the agp slot.

When it has the cards in it won't do anything except make the bong and the fans come on and then after a minute or so a red light comes on behind the processor and the fans start revving up super loud. At first it would display up till the grey apple stage of the boot sequence and then hang.Now the display does not come on at all.when it is doing this the machine will not respond to any keystrokes etc. so no target disk. when i pull the cards out all is normal and i can boot into target disk ,safe boot,whatever except i need to connect to it via remote desktop to see anything.Like this the machine is stable and will run normally.I also tried disconnecting the optical drive and hard drives to see if that helped but it didn't .

Of course I have reset Pram and the pmu also.

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This can be due to a Northbridge problem, or simply need a PRAM and PMU reset.

The first thing to try is to reset the PMU. Refer to this picture as a reference. Hold the button in for 30 seconds. Follow this article for PMU reset instructions. SMC is Intel only with Macs.

To reset the PRAM on the system, shut the system down. Once you do this, hold Command+Option+P+R and then it will reboot. Hold this for 30 seconds or until the system reboots and see what happens.

If this doesn't fix the problem, it's the RAM, power supply or motherboard. However, some of these are due to a dead PRAM battery. Most of them seem to have bad motherboards, but it may not hurt to try new RAM and see if the problem clears up. You can try the power supply if you want, but this part is very hard to find.

Here's the guide for the PRAM Battery, the guide for the RAM and a guide for the motherboard.

Power Mac G5 PRAM Battery 이미지

안내서

Power Mac G5 PRAM Battery Replacement

난이도:

아주 쉬움

2 minutes

Power Mac G5 RAM 이미지

안내서

Power Mac G5 RAM Replacement

난이도:

쉬움

10 - 15 minutes

Power Mac G5 Motherboard 이미지

안내서

Disassembling Power Mac G5 Motherboard

난이도:

운영

30 - 40 minutes

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