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  1. #1


    Member Since
    Mar 01, 2009
    Posts
    3
    G5 white screen with external interrupt
    Hello,

    I have done some searching on Google and in some other forums regarding my G5 that won't boot. When I turn the G5 on it just scrolls a white screen real fast that reads External Interrupt at srr0:ff845bbc. I am not able to eject the Leopard CD and have tried by holding down the mouse key and by booting and holding the Option Key.

    I hear the normal Mac sound when it boots up but then it goes to the scrolling message. The fan also is on. I called Mac support and they tried walking me through getting into Leopard and getting the cd out but were not able to succeed at either and suggested I bring it in to my local store.

    Does anyone have any ideas, is this a bad board?

    Thanks,

    Peter

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    47,121
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, El Capitan
    If possible, hook your G5 up firewire to firewire to another Mac and boot up in Target disk mode. See the following Apple KB article: Link If that's successful, you should be able to eject the Leopard CD and run some tests on the G5 from the good machine.

    Regards.

  3. #3


    Member Since
    Oct 24, 2010
    Posts
    1
    Unhappy i'm having the exact problem
    This seems to be the only thread on the internet discussing this problem.
    I searched apple help with no luck.

    i tried the advice of rebooting as a target drive, the target drive does not work, however holding down the T does reveal this text

    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030

    then lists information about the build and a message that says "welcome to open firmware"

    there is also instructions to "continue booting, type mac-boot an press return"

    The text is held in place until I release the "T" key then the problem described by the OP happens as normal.

    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030
    external interrupt at %SRR0: 00000000.ff845b6c %ssr1: 10000000.0200b030

    This is a g5 iMac.
    It runs great.
    Or at least it did
    Its this fixable?

  4. #4


    Member Since
    Jan 07, 2011
    Posts
    1
    same problem
    I have the same problem did you find a solution?

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