The PowerMac G5 is a desktop computer first produced in 2003 by the Apple Corporation. This guide will review the repair process of an Apple PowerMac G5 model number A1047 EMC 2061 from 2004. It was discontinued in 2006 as part of the Intel switch first to developers then consumers.

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Mac G5 spontaneously shuts down

I have an older single processor Power Mac G5 (1.6 G I believe) that began shutting down for no reason. It now will not boot - but starts the process normally - with the chime and the fans - but then shuts down after about 15 seconds. I have checked the power supply and am getting 5 volts - I checked the pram battery - and am getting 3.5 volts. I do not see any physical signs of capacitor problems. What am I missing here??


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Open the unit, boot it and observe the diagnostic LEDs they should be more help in pointing to the source of your trouble.

Also: follow some of the tags at the right for possible information/inspiration.

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Thanks Machead - the LED diagnostics on the Power Mac G5 don't seem to be of much use - they just indicate to "call apple" if they are red! Any idea what those LED's signify?

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Sorry - no I do not have any more information to provide.

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