Re: G5 Tower Won't Start

2015-09-16 Thread Bruce Johnson

> On Sep 16, 2015, at 2:53 PM, g3-5-list@googlegroups.com wrote:
> 
> 
> My only guess is power supply failure. It there anything else to try. Right 
> now it sits unplugged with PRAM battery removed. I will try again Thursday 
> morning.

Does your G5 have an Apple Cinema Display attached? try disconnecting it and 
plugging in a regular VGA monitor.

This happened to a prof here when the power supply for his 24” Cinema Display 
died. Really weird.

(He ended up going through 2 of the power supplies before he made Apple give 
him one from a 30”..no more dead power supplies after that. The 30” ps is 
noticeably beefier than the 24”)

-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs

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G5 Tower Won't Start

2015-09-16 Thread 'glenstrek' via G-Group


Dual 2.5 MHz (2004), LCS


Went to wake my G5 this morning and found it had shut off during the night. 
When I hit the power button it would click on then click off in less than 
one second. The power light comes on and quickly fades. It repeated this 
problem after several attempts to start.


I reset the SMU button using the Apple knowledge base article as reference. 
Put it back together and hit the power button; this time one click and the 
power light remained on, no fan noise, no chime.


Tried SMU reset again this time removing the PRAM battery and got back to 
the click on click off situation.


Oh, I also tried reseating the cable from the power button to the 
motherboard but forgot to test the PRAM battery voltage, which probably 
does not  matter.


My only guess is power supply failure. It there anything else to try. Right 
now it sits unplugged with PRAM battery removed. I will try again Thursday 
morning.


Help —glen


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