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  1. #1


    Member Since
    Jun 29, 2010
    Location
    uk
    Posts
    21
    Specs:
    Dual 2 GHz Power PC G5 2005. 6.5 GB Ram, OS X 10.5.8. Macbook 2.4 GHz core 2 Duo, 2 GB, OS X 10.5.8
    G5 PowerPC keeps powering down??.....
    Today my Mac keeps powering down. 3 times so far...
    can't see anything obvious. machine doesn't seem hot, in fact it seems slightly cooler than normal. plugs are all fully pushed in etc...
    Probably had about 4 programs running at the time.
    only thing that has changed today is i have just changed the modem (which can't have anything to do with this) and the display settings (again can't see why that would do anything)
    Otherwise the machine is just as it always has been. fans all seem to be running fine
    any suggestions anyone?
    thanks

  2. #2

    baggss's Avatar
    Member Since
    Oct 10, 2004
    Location
    Margaritaville
    Posts
    10,311
    Specs:
    27" 3.4 Ghz i7 iMac-13" C2D Macbook-OSX 10.10.2 -64Gb iPad 2-64 Gb iPhone 6+-ATV 2-14Tb of Storage
    You need to find an App that allows you to monitor the temperature of the machine. I recommend Temperature Monitor/Temperature Monitor Lite. G5s are some what notorious for having heat issues.

    What kind of machine is this btw?


  3. #3


    Member Since
    Jun 29, 2010
    Location
    uk
    Posts
    21
    Specs:
    Dual 2 GHz Power PC G5 2005. 6.5 GB Ram, OS X 10.5.8. Macbook 2.4 GHz core 2 Duo, 2 GB, OS X 10.5.8
    thanks for getting back to me.
    i have downloaded the temperature monitor and although it is giving me 7 different readings from around the machine the only ones which give a specified upper limit are the CPU A and B.
    having watched them they do fluctuate by nearly 2 degrees so i guess it could have hit the upper limit and shut down. is that what happens?
    if so what is best to do? - give it a clean - it looks fairly dusty in there which can't help....
    my machine specs as per the specs listed to the side <-
    cheers

  4. #4

    MacDude121's Avatar
    Member Since
    Sep 22, 2010
    Posts
    1,426
    Specs:
    Black MacBook 2.2GHz C2D, 4GB Ram - iMac G4 700MHz, 512MB Ram
    Quote Originally Posted by brightondf View Post
    thanks for getting back to me.
    i have downloaded the temperature monitor and although it is giving me 7 different readings from around the machine the only ones which give a specified upper limit are the CPU A and B.
    having watched them they do fluctuate by nearly 2 degrees so i guess it could have hit the upper limit and shut down. is that what happens?
    if so what is best to do? - give it a clean - it looks fairly dusty in there which can't help....
    my machine specs as per the specs listed to the side <-
    cheers
    Yes. Give it a cleaning first thing. Just simple stuff like that can do wonders for a Computer. Especially if it seems that you're having heat issues, and it's dusty in there.

  5. #5

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,872
    Specs:
    Imac 27" Retina 3.3GHz, 512GB Flash, 16GB memory, OS X.11.4.
    Pay particular attention to the front inlet which is quite prone to gathering dust and remove the graphics card and make sure it is clean and the fan , if fitted, is operating.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  6. #6

    baggss's Avatar
    Member Since
    Oct 10, 2004
    Location
    Margaritaville
    Posts
    10,311
    Specs:
    27" 3.4 Ghz i7 iMac-13" C2D Macbook-OSX 10.10.2 -64Gb iPad 2-64 Gb iPhone 6+-ATV 2-14Tb of Storage
    Quote Originally Posted by brightondf View Post
    thanks for getting back to me.
    i have downloaded the temperature monitor and although it is giving me 7 different readings from around the machine the only ones which give a specified upper limit are the CPU A and B.
    having watched them they do fluctuate by nearly 2 degrees so i guess it could have hit the upper limit and shut down. is that what happens?
    if so what is best to do? - give it a clean - it looks fairly dusty in there which can't help....
    my machine specs as per the specs listed to the side <-
    cheers
    CPU temps are what you ant to look at. A 2% fluctuation is perfectly fine and you can see that at idle as room temp changes, but I'm wondering what the numbers are? 165F 180F, 200F, 210F? Please let us know.

    I recently gave up on my Quad G5 PPC PowerMac because of temperature issues. About 202 seemed to be the upper limit before it would turn off. When it turns off does it shut downs or do the fans kick into High gear and the screen goes blank?


  7. #7


    Member Since
    Jun 29, 2010
    Location
    uk
    Posts
    21
    Specs:
    Dual 2 GHz Power PC G5 2005. 6.5 GB Ram, OS X 10.5.8. Macbook 2.4 GHz core 2 Duo, 2 GB, OS X 10.5.8
    i'll give the dust a bit of a clean today....
    watching the temps for a while yesterday it actually ranged between 41c'ish up to around 70c'ish. upper limit is 76c (168f)and it was around 68c (155f)yesterday when i first started checking - after it had been on all day.
    the fans fairly often kick up a gear but normally only briefly - probably once every hour or so

  8. #8

    baggss's Avatar
    Member Since
    Oct 10, 2004
    Location
    Margaritaville
    Posts
    10,311
    Specs:
    27" 3.4 Ghz i7 iMac-13" C2D Macbook-OSX 10.10.2 -64Gb iPad 2-64 Gb iPhone 6+-ATV 2-14Tb of Storage
    Ok, it's not likely a heat issue then.


  9. #9

    sabot's Avatar
    Member Since
    Nov 04, 2009
    Location
    Surrey/Hants border UK
    Posts
    81
    Specs:
    "Cypher" Powermac G5 2.3 DualCore QuadroFX4500 23" cinema display
    just as a reference for you i've just checked the stats for my G5 & with just regular browsing that im doing at the moment both my CPU's are showing around 63 degrees

  10. #10


    Member Since
    Jun 29, 2010
    Location
    uk
    Posts
    21
    Specs:
    Dual 2 GHz Power PC G5 2005. 6.5 GB Ram, OS X 10.5.8. Macbook 2.4 GHz core 2 Duo, 2 GB, OS X 10.5.8
    i keep the readings display on screen for the last couple of days and machine seems to be around 45degrees at turn on then generally sits around 63. but it often starts to rise up to just into the 70's then is cuts out at 77degrees. but it only happened once today..
    although now the internet has stopped working??
    i have checked the cable on my laptop and it is fine. The CPU's block the view of where the cable goes.
    Anyone know of what else it could be? Have tried to fix through network diagnostics but nothing
    feels like my machine is beginning to fall apart :-(

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