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davrosG5
I haven't seen my friends in so long
Joined: Fri Apr 24, 2009 6:37 am
Posts: 6954
Location: Peebo
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So, I push the power button on my PowerMac G5, it clicks once and switches back off instantly. Repeated several times.
Unplug for a minute of so, plug back in and starts up first time.
Do I need to replace my motherboard battery?
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When they put teeth in your mouth, they spoiled a perfectly good bum.
-Billy Connolly (to a heckler)
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| Sat Jul 30, 2011 5:33 pm |
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Amnesia10
Legend
Joined: Fri Apr 24, 2009 2:02 am
Posts: 29240
Location: Guantanamo Bay (thanks bobbdobbs)
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No it solves one of the problems on boots. I had a much more severe problem and this was number one on the solutions, next was a safe boot then a reset of various ram etc. Give it a few days and see if you have problems again. _________________Do concentrate, 007... "You are gifted. Mine is bordering on seven seconds." https://www.dropbox.com/referrals/NTg5MzczNTkhttp://astore.amazon.co.uk/wwwx404couk-21
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| Sat Jul 30, 2011 7:08 pm |
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davrosG5
I haven't seen my friends in so long
Joined: Fri Apr 24, 2009 6:37 am
Posts: 6954
Location: Peebo
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Mac has been fine for the last few days but today it wouldn't turn on again.
Unplugging and plugging back in sorted it again (I replaced the MB battery while it was unplugged as I had a spare battery).
I'm stumped as to why this has suddenly started happening. I really don't want to have to fork out for a new PSU (about £225 from what I can find on t'internet and that's without fitting).
_________________
When they put teeth in your mouth, they spoiled a perfectly good bum.
-Billy Connolly (to a heckler)
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| Wed Aug 03, 2011 6:32 pm |
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steve74
Doesn't have much of a life
Joined: Fri Apr 24, 2009 12:43 pm
Posts: 1798
Location: Manchester
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Have you tried resetting the P-RAM...? Restart with Command+Alt+P+R held down until you hear the 2nd startup chimes.  The G4 PowerMacs had a PMU (Power Management Unit) button on the motherboard that you could press to reset the PMU. Not sure if the G5 PowerMacs have the same thing?
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* Steve *
* Witty statement goes here *
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| Wed Aug 03, 2011 7:27 pm |
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davrosG5
I haven't seen my friends in so long
Joined: Fri Apr 24, 2009 6:37 am
Posts: 6954
Location: Peebo
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I haven't zapped the PRAM yet however I would assume that replacing the battery would have much the same effect.
This particular G5 has a SMU not a PMU apparently, unplugging it for a few minutes resets it.
_________________
When they put teeth in your mouth, they spoiled a perfectly good bum.
-Billy Connolly (to a heckler)
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| Wed Aug 03, 2011 7:56 pm |
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steve74
Doesn't have much of a life
Joined: Fri Apr 24, 2009 12:43 pm
Posts: 1798
Location: Manchester
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Ah right, I thought it was just the Intel Mac Pros that had the SMC reset and all PowerPC models had a PMU button, but I must have got that wrong somewhere along the line! Have you tried just putting the G5 to sleep instead of shutting it down? It only uses a few watts of power in sleep mode.
_________________
* Steve *
* Witty statement goes here *
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| Wed Aug 03, 2011 8:37 pm |
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davrosG5
I haven't seen my friends in so long
Joined: Fri Apr 24, 2009 6:37 am
Posts: 6954
Location: Peebo
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The very last lot of G5's (the late 2005 model dual core ones) have the SMC, everything earlier has the PMU.
I've never been keen on using the Sleep option. I only tend to have the Mac on in the evenings and not every day so it hasn't seemed worth it to leave it 'on' even in sleep mode.
_________________
When they put teeth in your mouth, they spoiled a perfectly good bum.
-Billy Connolly (to a heckler)
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| Wed Aug 03, 2011 8:52 pm |
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ianfsb
Has a life
Joined: Thu May 12, 2011 2:42 pm
Posts: 23
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davrosG5 wrote:
"I haven't zapped the PRAM yet however I would assume that replacing the battery would have much the same effect".
No, that's not correct.
If the PRAM has been corrupted (the reason for zapping it) renewing the battery will not do this. The PRAM chip needs to be "flushed" hence the need to zap 3 times (i.e. from a cold boot hold down the keys until you hear the chimes for a total of 3 times - a fourth chime will also reset the video ram).
HTH.
Last edited by ianfsb on Thu Aug 04, 2011 12:19 pm, edited 1 time in total.
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| Thu Aug 04, 2011 9:28 am |
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steve74
Doesn't have much of a life
Joined: Fri Apr 24, 2009 12:43 pm
Posts: 1798
Location: Manchester
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Hey Ian! Great to see you over here since the demise of the MacUser forums. 
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* Steve *
* Witty statement goes here *
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| Thu Aug 04, 2011 11:17 am |
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ianfsb
Has a life
Joined: Thu May 12, 2011 2:42 pm
Posts: 23
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Hi Steve! I've been lurking about for some time... Greetings to all  Ian.
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| Thu Aug 04, 2011 12:18 pm |
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ProfessorF
What's a life?
Joined: Thu Apr 23, 2009 7:56 pm
Posts: 12030
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Bout time you turned up to lift the class of the place.  Good to see you sir.
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| Thu Aug 04, 2011 12:41 pm |
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davrosG5
I haven't seen my friends in so long
Joined: Fri Apr 24, 2009 6:37 am
Posts: 6954
Location: Peebo
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Good to see you about Ian. I shall have a go at the PRAM reset and see if it works. Problem seems to be getting worse though. I'm considering getting a second hand Mac. Has anyone got any experience of using Scrumpymacs? They appear to be in Ipswich (where I have some relatives that I occasionally visit).
_________________
When they put teeth in your mouth, they spoiled a perfectly good bum.
-Billy Connolly (to a heckler)
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| Sat Aug 06, 2011 4:45 pm |
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tombolt
Spends far too much time on here
Joined: Fri Apr 24, 2009 8:38 am
Posts: 2967
Location: Dorchester, Dorset
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I bought a g4 mdd from them that's still going strong. I'd recommend them.
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| Sat Aug 06, 2011 5:08 pm |
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ProfessorF
What's a life?
Joined: Thu Apr 23, 2009 7:56 pm
Posts: 12030
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I'll second Scrumpymacs, had a second hand MDD from them too and it was fine. Very clean.
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| Sat Aug 06, 2011 7:27 pm |
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jonbwfc
What's a life?
Joined: Thu Apr 23, 2009 7:26 pm
Posts: 17040
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Hmm.. do they buy or just sell?
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| Sun Aug 07, 2011 12:08 pm |
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