FireWire fried by power cut?

Discussion in 'iMac' started by Phil.E., Dec 20, 2009.

  1. Phil.E. macrumors newbie

    Joined:
    Dec 20, 2009
    #1
    Someone switched off the power to my iMac the other day. Since I've rebooted:

    a] System Profiler shows no awareness of FireWire ("Unable to list FireWire devices" in red)
    b] Every boot takes about five minutes, 3+ of which seems to be spent waiting for a response from the FireWire socket (the logs show a 3-minute gap followed by a line that goes something like this:
    "/usr/lib/exec/hidd: Timeout waiting for IOKit to be quiet")
    c] if it's idle long enough to go to sleep, it goes into a kernel panic (the last line in the log before the panic says
    "kernel[0]: IOPMSlotsMacRISC4::determineSleepSupport has canSleep true")

    b] looks connected to a], but I can't see any connection with c] (apart from the reference to IO).

    This is a last-generation PowerPC G5 from 2005, recently fitted with a new logic board after repeated kernel panics (where 'recently' = 'over 90 days ago'). I'm wary of doing anything too drastic with it, as my TM disk and my alternative boot partition are on a FireWire-attached drive & are hence both inaccessible precisely when I'd most like to see them. I have tried flashing the PRAM, though - it made no difference at all.

    Any thoughts on what's going on and what (if anything) I can do about it?

    Phil
     
  2. ljonesj macrumors 6502a

    ljonesj

    Joined:
    Oct 20, 2009
    Location:
    Kingsport TN
    #2
    no good can u unstall the fire wire from the device listing then reboot to see if will come up i know on windows sometimes it looses usb and u ahve to to do that to get it to work again
     
  3. Alrescha macrumors 68020

    Joined:
    Jan 1, 2008
    #3
    http://support.apple.com/kb/HT1317

    "If the issue persists, try these steps:

    Shut down the computer.

    Disconnect all devices and all other cables, except the keyboard and mouse cable(s).

    Disconnect the computer from the power outlet and wait for 3 to 5 minutes.
    Plug the computer back in and turn it on.

    Reconnect the device(s) (one at a time if there is more than one) and test. Test with each port if you have more than one."
     

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