Powerbutton reacts, but doesn't start G5

Question

Power Mac G5

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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Peter @peter19719

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投稿日: 2010年8月3日

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Powerbutton reacts, but doesn't start G5

After having being shut down a couple of weeks, my powermac G5 dual 2,3 (PowerMac11,2) won't start up.

As seen on this video http://www.spildaftid.dk/peter/G5_error.... the button reacts with a click-sound and the red diode, but nothing happens. You can see on the video that when I try the third time, I keep the button in, which results in the white power light keeps being on, but nothing happens after that (I tried to let it be on for five minutes).

There is no startup sound, no sound from HD (which is only 4 months old), nothing on the screen (and can't obviously start from dvd or external drive), the internal battery is also only around 4 months. The white light doesn't blink.

I have tried zapping the PRAM and pressing the PMU w/o any luck.

TIA,

Peter

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markus weiher @markusweiher 評価: 35.1千 140 71 53 · Answer 1 · 2010-08-03T13:44:59-07:00

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markus weiher @markusweiher

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投稿日: 2010年8月3日

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i never had one of those power mac's - but it looks like a capacitor or a power supply issue - had a similar thing on my hp notebook - in my case it was a capacitor problem. but i've also seen problems with empty pram batteries!

i would start with measuring the PRAM battery, if that won't help - measure the PSU - the pinout (and possible conversion of an atx psu can be found here (CLICK)) with a multimeter

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