Page 1 of 2 12 LastLast
Results 1 to 15 of 24
  1. #1

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    Powermac G5 Quad: Overtemp + Checkstop
    I recently acquired a faulty powermac G5 (the things a beauty, even if its broken )

    the problem with it is that these two lights come on, and the fans go crazy. Apparently it boots up occasionally, but i dont want to risk it, its definitely not running right. I mean, i hear the boot chime, but i havent got a hard drive in it so it isnt gonna boot.

    i realise this problem could be one of two things: the logic board or the processor, is faulty. but ive been reading up on it and some people have experienced their coolant "gumming up" in the liquid cooled system. (ive cleaned most of the fans extensively and they are all spinning).

    so do you reckon i should remove the processor, check for leaks and replace the coolant? or should i just strip the thing out and salvage whats left of it, and build a PC inside it?

    cheers.
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,208
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    Sounds like fun. You might hang on a bit and wait for Harry or Nick to reply. They both have experience with working on that machine. Don't salvage it out yet.

  3. #3

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,853
    Specs:
    Imac 27" Retina 3.3GHz, 512GB Flash, 16GB memory, OS X.11.4.
    It may well be a beauty but a useless beauty if she won't boot and is dead!

    What are the specs of the G5 as there are numerous models. Quad Core 2.7 and 2.4 Dual Cores late 2005 are both liquid cooled using coolant similar to your motor vehicle, and a leak spells death of logic board and processors alas! First question is the perspex wind deflector in position when you remove the side cover? If not this will cause precisely the problem you describe Ron. The if it is a Dual Core have a look at this link for LED diagnosis:-

    http://support.apple.com/kb/HT2652?viewlocale=en_US

    Keep us posted?
    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!

  4. #4

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    Quote Originally Posted by chscag View Post
    Sounds like fun. You might hang on a bit and wait for Harry or Nick to reply. They both have experience with working on that machine. Don't salvage it out yet.
    i agree, my reason for buying it would be as a fun project

    for some reason the apple support site is down atm.

    ive always placed the wind deflector back on before booting, so its not that.

    its a late 05 quad core powermac, with 8gb RAM.

    (ive tried rearranging the ram into the correct matched slots and so on so im happy it isnt a ram issue.)

    it also looks normal under the "G5" cover: cant see any leakage on the outside. so if there is a leak im guessing it would be internal.

    ive already looked up the lights, they mean "CPU Hang" and "CPU overtemp". both indicate replacing the processor or logicboard as the remedies (as the last resort). the thing is - it does boot sometimes, and every time i turn it on i hear the chime, so im thinking its the processor overheating. i dunno. ive also cleared all the fans out. there was a load of gunk in there.

    ill upload some photos soon and show you the inside. its a good looking machine, picked it up cheap, now just to get it to do something

    appreciate the help for this btw guys.
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

  5. #5

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    pics






    Attached Images Attached Images
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

  6. #6

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,853
    Specs:
    Imac 27" Retina 3.3GHz, 512GB Flash, 16GB memory, OS X.11.4.
    Sure sounds like a leak destroying the CPU. Ask baggss how he got on with his:-
    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!

  7. #7

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    okay cheers, will do!
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

  8. #8

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    if i were to take the processor apart, what would be the tell tale signs of a coolant leak on the cpu?
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

  9. #9

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,853
    Specs:
    Imac 27" Retina 3.3GHz, 512GB Flash, 16GB memory, OS X.11.4.
    Have a look at this Rob:-


    PowerMac G5 Coolant Leaks/Repairs
    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!

  10. #10

    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
    Mine never showed any signs of coolant leak, otherwise I would have followed the above advice. Over the years of having the heat issue I would occasional lay the machine on its side or upside down immediately after shutting it down looking for a coolant leak I could point out to the Apple folks. Nothing. That's what leads me to believe it was either a paste issue on CPU A or a clog in CPU A's cooling loop.

    I suppose I could still call Apple and complain about the issue. Maybe I could get a new MAcPro out of the deal!


  11. #11

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    Quote Originally Posted by harryb2448 View Post
    Have a look at this Rob:-


    PowerMac G5 Coolant Leaks/Repairs
    wow, now thats some serious leakage.

    baggss, what do you mean by paste issue, the thermal grease applied to the top of the CPU?

    hopefully some time next week i will have enough time to get the LCS+CPU off. ill keep you updated with what i find, im half expecting there to be a massive rusty lump of metal behind it. im fingers crossed its not, but i really am expecting it now. while i havent had "puddles of coolant" like described in the link above, im still thinking theres something bad behind there.

    cheers
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

  12. #12

    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 robduckyworth View Post
    baggss, what do you mean by paste issue, the thermal grease applied to the top of the CPU?
    Yes. There have been issues in the past with this on same Apple models, although not the PM G5s that I know of. I'll eventually take mine apart and see as well. I wonder if once I get it broken down and see whats there if I can still hit Apple up on it if was a coolant leak.


  13. #13

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    if you get extremely lucky, they might

    haha i doubt apple would pay for mine. i have no original discs for it and the serial number isn't registered to me. i dont think it had applecare on it otherwise when the previous owner rang up they wouldnt have told him it would be 600 to fix.
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

  14. #14

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    right i have got the video card, all fans, speaker, and half the LCU mounting bolts off (the rest are extremely hard to get to, had to saw an allen key to size to actually get it into the area to unscrew. apple really didnt want you to mess with it.the amount of "warranty pins" on this thing is ridiculous.
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

  15. #15

    robduckyworth's Avatar
    Member Since
    Jan 04, 2011
    Location
    Reading, UK
    Posts
    2,971
    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    right just got the CPU off, still no evidence of any water spillage! the motherboard must be faulty.
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
    Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Using my (new to me) PowerMac G5 2.5 Quad
    By rfomlover in forum Apple Desktops
    Replies: 6
    Last Post: 08-26-2012, 03:16 PM
  2. Help with Quad G5 PowerMac Wireless
    By misterfine in forum Internet, Networking, and Wireless
    Replies: 3
    Last Post: 12-31-2006, 06:58 PM
  3. Powermac 2.3 or Quad 2.5 G5
    By strife3713 in forum Apple Desktops
    Replies: 17
    Last Post: 03-15-2006, 11:44 AM
  4. Replies: 13
    Last Post: 03-08-2006, 11:53 PM
  5. Powermac G5 2.7 Quad
    By BEEEsH in forum Apple Rumors and Reports
    Replies: 18
    Last Post: 11-03-2005, 11:49 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •