On 2016-07-31 18:29 Kris Tilford wrote:
On Jul 29, 2016, at 10:27 AM, Zeb Favoovis <joshsambr...@gmail.com
<mailto:joshsambr...@gmail.com>> wrote:
>
> Replaced memory in my G5, now it beeps twice and refuses to start. Fans go to
> max. RPM. Does anyone know what is wrong?
This is what happens when the power supply is bad. Get a multimeter and check
the voltages. Search “PowerMac G5 pinout diagram” for the correct voltages. If
you need a power supply, some people have modified standard PC ATX power
supplies to work in G5’s. If you’re doing this much work, replace the thermal
paste on the CPUs, it’s gotta be completely dried & dead in over a decade.
Hi!
I disagree because the two beeps indicate a RAM problem.
The fans will always go up if no thermal management is initiated. This
also happens if you stay in the boot selection (holding Alt or Option on
start-up) for a very long time, and also if the PRAM battery is bad and
the start-up sequence doesn't pass the Power-On-Self-Test (POST). (To
name just two cases with high rpm fans.)
Though it *could* also indicate a PSU problem, it seems more likely to
be the replaced memory in this specific case.
Cheers,
Mac User #330250
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