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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac - G5 white screen with external interrupt


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PeterGibons

 
Member Since: Mar 01, 2009
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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
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chscag

 
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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.
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abstractmachine

 
Member Since: Oct 24, 2010
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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?
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clinteastwood

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