Power Mac G4 KPs -Help!

Discussion in 'PowerPC Macs' started by Lord Blackadder, Dec 1, 2009.

  1. Lord Blackadder macrumors G5

    Lord Blackadder

    May 7, 2004
    Sod off
    Ok folks, I'm up a certain creek without a certain implement.

    Last week the display failed on my PowerBook G4 - for the third time. No matter, I have my Power Mac.....

    ....Or maybe I don't. This week, my Digital Audio G4 started to KP often and seemingly at random. Today the machine has become unusable...it won't even boot every time, it KPs at the login screen. Several times it happened while trying to run a VIDEO_TS folder. A few times it happened using Sherlock. Other times while running Firefox, and still others happened while the machine was idle...I've done all sorts of cleaning and repairing of disks and I'm sure it must be a hardware failure.

    I've copied the crash log below. It seems the failure may be related to my SATA controller, which is an SIIG product...can anyone more versed in this confirm it for me?

    I've got some deadlines coming up and unless I can get this fixed today I'm going to have to get a new machine - but a new SATA controller is an easy fix if that is the problem...any and all help is warmly appreciated.

    panic(cpu 0 caller 0x000A8D80): Uncorrectable machine check: pc = 0000000040B693E0, msr = 0000000000149030, dsisr = 42000000, dar = 00000000003A6000
    AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
    L2FIR = 0000000000000000, BusFir = 0000000000000000

    Latest stack backtrace for cpu 0:
    0x00095718 0x00095C30 0x0002683C 0x000A8D80 0x000A8010 0x000ABD00
    Proceeding back via exception chain:
    Exception state (sv=0x4569AC80)
    PC=0x40B693E0; MSR=0x00149030; DAR=0x003A6000; DSISR=0x42000000; LR=0x40B693D4; R1=0x17ACBD60; XCP=0x00000008 (0x200 - Machine check)
    0x40B693D4 0x40B5BD24 0x0003C744 0x000A9894
    Kernel loadable modules in backtrace (with dependencies):
    dependency: com.apple.iokit.IOPCIFamily(1.7)@0x27d22000
    dependency: com.apple.iokit.IOATAFamily(1.6.0f2)@0x40b4f000
    Exception state (sv=0x4110DA00)
    PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

    Kernel version:
    Darwin Kernel Version 8.6.0: Tue Mar 7 16:58:48 PST 2006; root:xnu-792.6.70.obj~1/RELEASE_PPC
  2. Carolus Rex macrumors newbie

    Nov 26, 2009

    Don't know from the log, but if you are "certain" that this is a HW problem, then disconnect EVERYTHING that you don't have to have added to the computer. That includes any internal cards. And memory.After this, start swapping the memory trying if any of the modules are faulty. Move them round in different slots too. (It never hurts to start everything with a PRAM reset either. Sometimes it solves the strangest of problems). See if you can re-produce the KP/error. If you can, you have at lest ruled out the other Hardware. If you cannot, then start adding the stuff back, one item at a time until you get the KP again.

    Hope I'm not to late here.

    Perhaps you could, as an alternative, hook up your PB to an external display ad use that?

    And ofcourse, the first thing you do is to remove the SATA controller to see if that is the problem. It might be that the cards firmware as it is is incompatible. The card might not be faulty, but wrong firmware.

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