re: Mac OS crashing HELP PLS!

Discussion in 'macOS' started by tango472, Jun 19, 2005.

  1. tango472 macrumors newbie

    Nov 27, 2004

    for some reason yesterday, the computer started to freeze within 5mins of startup. it would boot up fine, but when you try and use any application (eg. safari) it would simpy crash.

    i have tried the following to rectify the problem, but it seems now to have gotten worst.

    1. i reset the permissions through the disk utility - computer crashed half way through

    2. i reset the permissions through TERMINAL - successful

    3. i also ran FSCK (by typing "fsck -f") - now the computer does not even start up. it seems to freeze even before it gets to the blue/grey screen..

    what could be the problem and how can i rectify this!
  2. Soulstorm macrumors 68000


    Feb 1, 2005
    What do you mean by saying "within 5 min of startup"?
    Also, it is hard to see what the problem is since you don't tell us what were you doing last time you opened your computer.

    You don't tell us what do you mean by "computer crashed half way through". You mean you had a kernel panic, the application closed and the mouse and anything else was frozen? What was it?

    You don't even tell us what your system is and what hardware you are using! How do you expect to get a decent answer?

    Some things to do:
    --Zap your PRAM.
    --Startup from your OS X install CD, run disk utility and verify your disk.
    --Perform the Apple Hardware Test that came with your computer
    --Please give information about your current software and hardware, and tell more about the symptoms of your problems.
  3. tango472 thread starter macrumors newbie

    Nov 27, 2004
    seems to more serious now!

    ok i am running a power mac, dual 1.8GHz, 1.5 GB RAM - running on mac os 10.3.9.

    when i say within 5 mins, i mean i switched on the computer, and within 5mins the computer would freeze - the mouse is inactive, cursor does not move, screen freezes up, force quit does not work. the application is not relevant (i don;t think), as it occurs with anything, safari, file browsing, quicktime, internet explorer, etc.

    ok, i have tried the PRAM thing - no success

    however, the problem seems to have developed to a more serious on since i last posted the query.

    the computer does not even startup now. i switch it on, and the traditional apple sound is heard (bong) and then after a few minutes the fans kick in getting louder and louder. the screen stays black and nothing is appearing.

    the disk drive does not open (even with mouse button pressed on start up!). hence, i cannot even carry out the hardwarte CD test.

    this all seems to have stemed from when i reset the permissions through terminal, followed by the FSCK (by typing "fsck -f") command. i entered reboot and hit enter after this and thereafter the statup problem has been appearing.

    is this a hardware or software issue and how serious is this.

    one final point i might add, the red light within the case of the computer (visible just above the G5 power switch comes on)

    i hope this provides enough info.
  4. mad jew Moderator emeritus

    mad jew

    Apr 3, 2004
    Adelaide, Australia
    Where did you get your RAM from? Did you install it yourself, and if so, how long ago?
  5. tango472 thread starter macrumors newbie

    Nov 27, 2004
    i upgraded the RAM when i bought the computer. it is 4x512MB of crucial memory. to date, i have not had any problems with my machine at all. first time in 14months this kinda thing has happened.

    what does the red light (LED) inside the machine signify?
  6. eva01 macrumors 601


    Feb 22, 2005
    Gah! Plymouth
    i would say you have a hardware difficulty, especially if you can't open the disk drive with the mouse click. Try taking out all the thirdparty RAM and leaving in the original apple ram, see if that works
  7. tango472 thread starter macrumors newbie

    Nov 27, 2004
    tried that too! i left just the 2x512MB sticks there and still does not go on!

    a bit concerned as the whole kit cost me quite a bit f money and its 2montsh over the 12months apple warranty...
  8. Vultcher macrumors newbie

    Aug 8, 2005
    G5 freezes

    I hope this helps, I own a dual 2 GHz G5 and it randomly crashes regardless of OS version (I run tiger now) or application. The machine freezes and a red light comes on and the fans crank up.

    (i) the red light (LED), (I believe there are two of them). The G5 has a clever cooling system and control electronics - varying the speeds of the nine fans etc to keep the computer temp within specs, however this system is independant of of the computer processors etc its a stand alone electronic circuit that does its own thing, a failsafe. And one of its requirements is that it gets an (everything is OK) signal from the computer/OS itself at least every 2 sec.
    If assumes the worst and its fans on full power and red light on to indicate a problem. The fans and red light are not the problem just an by product.

    Its the computer OS thats freezing, I have read that certain video cards are causing the problems, some are more susceptible than others, I read about an developer who wrote a few lines of simple programming code that uses a few of the Open GL routines to do a screen draw and his routine can freeze his G5 pretty much 90% of the time.
    Solutions there may be a firmware fix on the way either from Apple or the video card manufacturers. I may be completely wrong and I'm open to comments but this is where my research has led me so far. i have tried everything to remedy the problem on my own machine. :cool:
  9. Vultcher macrumors newbie

    Aug 8, 2005

    The OS does the monitoring of the internal machine temps and power requirements and passes this info on to the external circuitary,but its still the external circuitary that controls the fans and it does its failsafe thing (fans on full red light on)if communications with the OS fail for more than 2 mins.

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