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  1. #1


    Member Since
    Dec 01, 2005
    Posts
    169
    Powermac G5 light problems
    I've recently inherited a friends old Powermac DP 2.0 G5 after it died a death. After some testing I diagnosed that that PSU had died in it- something that seems quite common.

    Having found some detailed instructions online, I sourced a replacement PSU and set about replacing it. All went well with no major problems. I put everything back together and then powered the machine on. The fans whirled to life but there was no video out. I then noticed that the power light was flashing twice and then a break.

    I checked on Apple's website and it was saying that 2 flashed is no ram installed. Yet there are 4 sticks installed - surely these all can't be dead? Has anyone got any words of advice? I'll be gutted if it's the logic board as the replacement PSU was really expensive....help!

  2. #2

    pigoo3's Avatar
    Member Since
    May 20, 2008
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    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    It's always possible that the ram in the G5 is not the original ram...or it was "upgraded" with incorrect ram.

    I would pull all of the ram...and try the ram 1 stick at a time.

    Good luck,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  3. #3


    Member Since
    Dec 01, 2005
    Posts
    169
    Hi Nick

    Thing is I believe they have to be installed in matching pairs. I've since tried each of them in various slots but nothing...starting to question how well I put it back together- very frustrating.

  4. #4

    pigoo3's Avatar
    Member Since
    May 20, 2008
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    U.S.
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    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Quote Originally Posted by Smartz View Post
    Hi Nick

    Thing is I believe they have to be installed in matching pairs. I've since tried each of them in various slots but nothing...starting to question how well I put it back together- very frustrating.
    Yeah I forgot about that (installing in pairs). You have 4 sticks of ram right (2 pairs)? Maybe 1 pair is the original ram, and the 2nd pair was an upgrade.

    I would look closely at the sticks of ram, and see if you can identify them as pairs...by the labels on the ram. The install each pair separately as pairs & see if that helps. Make sure the pair of ram are installed in the correct slots.

    The problem with the G5 may or may not be ram related...but I know in the past when I tried using ram that I knew might not have been Mac compatible...I did get similar symptoms that you described.

    God luck,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  5. #5

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    22,761
    Specs:
    Imac 27", i7 3.5GHz, 3TB Fusion drive, 32GB memory, macOS Sierra.
    And it may have been the logic board all along alas.

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