My Constantly Crashing Mac (help)

Discussion in 'General Mac Discussion' started by nate, Jul 2, 2004.

  1. nate macrumors member

    Jun 28, 2003
    Calgary, Alberta, Canada
    My Mac OS keeps crashing, constantly. Sometimes it works, and sometimes it doesn't. It likes to show the "You must press the power buttons and reset," error.

    I did some searching and I found out that it's called a Kernel Panic. I found something called panic.log; the latest panic log is below, all of them are the same!

    I've only had my mac since the end of March (this year), and it has worked fine up till a month a go. Now it's been crashing for no reason at all. Sometimes it stays on for awhile, and other times it does not -- I boot up and 15 seconds later it crashes.

    My panic log is huge, but all of the entries are the same -- and all of them say airport in them. I've turned off my airport for now, but I use it a lot for net access. I'm going to have to turn it on to post this -- meanwhile, I'll be praying it works. It usually does, but recently it stops working. If I leave my computer for a hour or so and turn it works fine for a while -- maybe an hour -- then it crashes. If I turn off and then on, it works for about 15 seconds and then crashes. Unless I turn off the airport card.

    The card never gave me problems before.

    But there is one thing I noticed -- my problems came after I got the new 10.3.4 update. After that I've been having crashes all the time. I installed the airport card a week after I bought the my mac at the store. I also bought some extra RAM.

    I have a 15" powerbook (G4, 1Ghz).

    Again, no problems until about a month ago. And after I got the new updates (which included airport updates). Is there a way to fix this?

    thanks, nate

    (I'm not techy, but I think it's the software update for the airport card and/or the airport card. Can anyone help?)


    Fri Jul 2 22:11:50 2004

    panic(cpu 0): Uncorrectable machine check: pc = 000000000041C5D4, msr = 0000000000149030, dsisr = 40000000, dar = 000000001C146008
    AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
    L2FIR = 0000000000000000, BusFir = 0000000000000000

    Latest stack backtrace for cpu 0:
    0x0008391C 0x00083E00 0x0001EDA4 0x00091834 0x00090B20 0x0009426C
    Proceeding back via exception chain:
    Exception state (sv=0x2D001500)
    PC=0x0041C5D4; MSR=0x00149030; DAR=0x1C146008; DSISR=0x40000000; LR=0x0042E6E4; R1=0x11F4BD30; XCP=0x00000008 (0x200 - Machine check)
    0x00000000 0x0042E6E4 0x00265CDC 0x00264BBC 0x00264B20
    Kernel loadable modules in backtrace (with dependencies):
    Exception state (sv=0x1F9E9780)
    PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

    Kernel version:
    Darwin Kernel Version 7.4.0:
    Wed May 12 16:58:24 PDT 2004; root:xnu/xnu-517.7.7.obj~7/RELEASE_PPC
  2. neoelectronaut macrumors 68030


    Dec 3, 2003
    Southeastern Louisiana
    I'm going to say what most people will say:

    Check the ram.

    Take out the module you put in yourself and leave the apple-supplied one in and see if it helps.
  3. Finiksa macrumors 6502a


    Feb 23, 2003
    Also try removing and re-seating the Airport Extreme card. Airport can often cause kernel panics if the card isn't making proper contact in the slot, it may have wiggled loose over time. Other than that checking the RAM is a good idea.
  4. titaniumducky macrumors 6502a


    Nov 22, 2003
    Run the Hardware Test CD. See if it finds any errors.

    If it doesn't, remove your Airport Card and then put it back in. Loose connections sometimes cause problems.

    If it still crashes, take the Airport Card out (use Ethernet if needed for the internet) and test it out. If it works now, call AppleCare (or go to a genius bar) and have them replace the card.

    If it still crashes without the card, take out the extra RAM you put in. Does it crash now? If so, call whoever sold you the RAM.

    If it STILL crashes after replacing the RAM, call AppleCare or visit the Genius Bar.

    Hope this helps.

    EDIT NOTE: Wow! I should start using the preview button: 3 edits!
  5. nate thread starter macrumors member

    Jun 28, 2003
    Calgary, Alberta, Canada
    I took out the card, and my powerbook worked fine. I used the computer for almost an hour without any problems.

    Then I put the airport card back into the slot, and now it seems to be working fine.

    Maybe that was it -- the airport card getting lose. I can see it happening, since I have a laptop.

    Thanks for the suggestions. Now lets see if it will continue to work.


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