Power Mac G5 Dual CPU crashing / not booting. Ideas?

Discussion in 'PowerPC Macs' started by jafingi, May 27, 2015.

  1. jafingi macrumors 65816

    jafingi

    Joined:
    Apr 3, 2009
    Location:
    Denmark
    #1
    I have a 2005 Power Mac G5 with Dual CPU's (think it's the 1.8 GHz version). Sometimes it doesn't boot; when I press the start button, no boot chime, and if I leave it on for awhile, the fans fires up at 100%. If I do a force shutdown, and start it a few times, the boot chime comes up, and it boots correctly to the desktop.

    Here, I would think that it could be a PSU issue, but wouldn't it be totally dead if it was the PSU? Because I can get to the desktop on 7/10 tries.

    But it also sometimes freezes while using it. It just freeze the current picture, and I cannot do anything. If I leave it on, the fans fires up again.

    So I'm more thinking about if it's a RAM issue? What do you think? And have anyone else have had issues like these?

    Thanks!
     
  2. ctmpkmlec4 macrumors 6502

    ctmpkmlec4

    Joined:
    Jul 4, 2014
    Location:
    Lyons, KS
    #2
    Do you have access to the AHT disc for your particular G5? If so, you might run the diagnostic and see if anything fails testing. I suspect it being an issue with the CPU or RAM. Have you replaced the PRAM battery lately?
     
  3. Altemose macrumors G3

    Altemose

    Joined:
    Mar 26, 2013
    Location:
    Elkton, Maryland
    #3
    I have had similar issues caused by faulty RAM. Even just one misbehaving stick can crash a computer, and it is even more so important in a machine that requires constant matched pairs.
     
  4. jafingi, May 28, 2015
    Last edited: May 28, 2015

    jafingi thread starter macrumors 65816

    jafingi

    Joined:
    Apr 3, 2009
    Location:
    Denmark
    #4
    Unfortunately not. So can't run the diagnostic.

    Replaced the battery a month ago with a fresh one.

    ----------

    I've ordered two new pairs of RAM. So going to see if that helps :) hope it's not the CPU/PSU. If that's the case, I might just bury it.
     
  5. Altemose macrumors G3

    Altemose

    Joined:
    Mar 26, 2013
    Location:
    Elkton, Maryland

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