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  1. #1


    Member Since
    May 12, 2011
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    5
    Powermac G5 USB ports not working
    Hello,
    I have a powermac G5 DUal 2.0, 3.5GB RAM, Leopard and Tiger latest OS

    USB ports stopped working. I have tried all the trouble-shoot procedures: Took out all PCI cards, Took out RAM, pressed the little SMU reset button on the logic board...

    I have bought Allegro USB 2.0 PCI card. I have tried to get it to work with no luck. I was getting all kinds of strange responses. Computer freezing, Then gray screen "You need to shut down your computer"
    messages like "USB device is drawing too much power, it will be shut off"

    And the mouse was working for few seconds and then froze.

    I have tried swapping diferent RAM and that is pretty much all I can do...no luck

    Is there anything else I can try before I throw this machine in the garbage???

  2. #2

    robduckyworth's Avatar
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    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    unplug all your peripherals, and try all your peripherals one at a time, to rule out any faults. (I would also remove the USB PCI card for now.)

    if this isnt the case, id be inclined to say the logic board is faulty.
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  3. #3


    Member Since
    May 12, 2011
    Posts
    5
    Yeah, I took them all out and all I could leave is the video card and memory.

    Since the USB's aren't working I can't do anything else. So I am positive it's the logic board.

    Is it complicated to replace logic board DIY or just throw it in the garbage ?
    ROKO DJOKOVIC
    **** COMMODORE 64 BASIC V2 ****
    64K RAM SYSTEM 38911 BASIC BYTES FREE
    READY.

  4. #4

    robduckyworth's Avatar
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    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    Its is extremely time consuming & exspensiveto replace one, even if you could find one.

    before you give up, wait for a couple more members to reply, with a bit more experience in G5s.
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  5. #5


    Member Since
    Dec 11, 2010
    Location
    Chicago
    Posts
    1,475
    Specs:
    late 2012 mini w/SSD
    Here are some replacement prices:
    Power Mac G5 Logic Boards : DV Warehouse, Your single source for your all digital video needs!

    Keep in mind, even after you repair the computer, it will be worth just $200-300...

  6. #6

    baggss's Avatar
    Member Since
    Oct 10, 2004
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    Margaritaville
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    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 can find USB PCI cards that will fit your Mac for fairly little money.


  7. #7


    Member Since
    May 12, 2011
    Posts
    5
    I have put in Allegra 2.0 USB PCI card, and getting all kinds of strange behaviour. Gray screen "You need to shut down"
    and message like "USB device is drawing too much power it will be shut down"

    I assume it's the logic board
    ROKO DJOKOVIC
    **** COMMODORE 64 BASIC V2 ****
    64K RAM SYSTEM 38911 BASIC BYTES FREE
    READY.

  8. #8

    baggss's Avatar
    Member Since
    Oct 10, 2004
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    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
    Either the logic board or the power supply. Either way it'll cost more to fix than the machine is worth. It might be time for a new(er) machine.


  9. #9


    Member Since
    May 12, 2011
    Posts
    5
    Yea, definitely not worth further investing.
    Mac G5 could be found on ebay for fairly cheap.
    ROKO DJOKOVIC
    **** COMMODORE 64 BASIC V2 ****
    64K RAM SYSTEM 38911 BASIC BYTES FREE
    READY.

  10. #10

    baggss's Avatar
    Member Since
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    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
    At this point his best bet is to either buy a used Intel Mac or just invest in a new one. The PPC architecture is dead no matter how much some might wish otherwise (myself included).


  11. #11

    chscag's Avatar
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    Jan 23, 2008
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    Fort Worth, Texas
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    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    The PPC architecture is dead no matter how much some might wish otherwise (myself included).
    Have to agree. And it's too bad because my special love has always been the small compact 12" iBook. I know, buy an 11" Air!

  12. #12


    Member Since
    May 12, 2011
    Posts
    5
    Yes, this is all true!
    I need to find some money for mac pro...

    It's always something!!!
    ROKO DJOKOVIC
    **** COMMODORE 64 BASIC V2 ****
    64K RAM SYSTEM 38911 BASIC BYTES FREE
    READY.

  13. #13

    robduckyworth's Avatar
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    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    I thought there were Intel Powermacs too, towards the end of the product's life, just before being taken over by the Mac Pro?
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
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  14. #14

    baggss's Avatar
    Member Since
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    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
    I thought there were Intel Powermacs too, towards the end of the product's life, just before being taken over by the Mac Pro?
    The PowerMac line was PPC only (PPC = Power PC = PowerMac). The first Intel Macs were MacPro's. Pretty simple.


  15. #15

    robduckyworth's Avatar
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    Specs:
    15" MBP, 2.5GHz i7, 750GB, 6770M 1GB, iPad 3, iPhone 4, custom PC
    yep, sorry, i got confused.
    If you find a post helpful, don't forget to use the reputation system (top right of post.)
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