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guycr
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sometimes won't boot

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Power Mac G5 late 2005 dual (EMC 2023)

One time the G5 will boot fine but if I shut down and try to restart just a black screen and fans full speed

Edited by: pollytintop ( )

The tech I use here in Costa Rica says I should buy the CPU and Logic Board. Seems like overkill perhaps. One majotrproblem is unavailability of long shaft hex drivers to disassemble the cpu.mobo!

guycr,

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rj713
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First try removing and resetting your ram--if you have more than one pair try leaving one pair out at a time.

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mayer
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Unplug your machine, disconnect your ethernet and any other peripherals. Press and hold the power button for ten seconds. Reconnect the power cable and start up. Check the date and time, if incorrect, replace the PRAM battery. Zap the PRAM, here's how: http://support.apple.com/kb/ht1939

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Donovan Sangster
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Unplug the power - from socket, then from PM G5. Removal door and plastic fan shield/guide. ground yourself and ensure you & PM are not on the same carpet - preferable non at all.

Remove the CPU/RAM fan. under the bottom bank of RAM there is a tiny silver button, press it, re-install everything previously removed. Power on unit(on Last 2005 PM they have no PMU ... this function is the SMU which I gave to reset.

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