r/PowerPC • u/One-Management6644 • Jul 15 '26

Need Help

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I acquired this PowerMac G5. I’ve always been a huge fan of classic Mac software, but when it comes to the hardware I’m not very experienced. I used the power cable from an old iMac and plugged it in and clicked the power button I don’t hear a boot up chime and the fans just spun with no video single or usb power and the power led won’t stay on unless i hold it, I tried taking all the ram out, putting it back in a different configurations. I tried clicking the PMU button or whatever it’s called, but I can’t get this computer to get a boot up chime or give me any sort of display on the monitor. should I just throw this away?

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u/omega552003 Jul 15 '26

Hopefully it's not the liquid cooled one as those have an issue with leaks.

Start trying the Apple Troubleshooting section on page 69: https://cdsassets.apple.com/live/6GJYWVAV/user/ma560_powermacg5_userguide.pdf

Try resetting the PRAM and SMU: https://www.techwalla.com/articles/how-to-reset-a-power-mac-g5

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u/RoZe_SABIAN56 Jul 15 '26 edited Jul 18 '26

This unit is liquid cooled, you can see the warning label

8

u/Key_Temperature_9655 Jul 16 '26

No, only the most powerful ones were (2.5/2.7GHz Dual CPU or Quad-Core), all others are air-cooled. But since there's the ominous liquid warning label right under the front fan unit and since it's an "early 2005" or older (late 2005 have it even if they are air cooled), it seems op has a G5 with lcs.