PB G4 freezes when getting too hot

Discussion in 'MacBook Pro' started by bonestruca, Jul 29, 2008.

  1. bonestruca macrumors newbie

    Nov 16, 2007
    Hey there,
    funny title, eh ? (; Not so funny problem.
    I started a thread some weeks ago because my PB crashes whenever I connect an external HD to it. I couldn't fix it, but since Timemachine continues making the backup although the PB crashes (keyboard and trackpad/mous stop working) I feel pretty save and still have it working.

    So here's the new issue: It freezes some 20 minutes after I start playing Call Of Duty. I tried everything, nothing worked so I decided to give it a last go and put some ice from the fridge in a towel and under the PB to cool it. Guess what happened - I can play all day, no freeze, no crash. So it seems to be some sort of overheating issue.

    I installed istat and it says the fans don't work at all - 0 rpm !!??
    These are the temperatures right after a freeze:

    HD: 44 °C
    CPU Bottom: 49 °C
    CPU Top: 52 °C
    Battery: 35 °C
    Power Supply: 53 °C
    Track Pad: 39 °C

    My questions:

    Is istat reliable (everything else seem to work) concerning the non existent fan speed ? What am I to do in case they prove true ?

    Are the temperatures too high or are they quite normal and it's just the PB that can't deal with them any more cause something else inside is broken ?
  2. wakka092 macrumors 6502


    Jun 20, 2007
    My PowerBook could get up to 62C before the fans went high-speed. For me, iStat is quite reliable. Are the fans kicking on, on their highest, loudest speed?
  3. TEG macrumors 604


    Jan 21, 2002
    Langley, Washington
    I would say it is likely that the fan is either actually dead, or wrapped in hair. Mine has a similar problem, so I have a desk fan set up next to it blowing air across it with it on an iCurve, and it stays room temperature or lower. At night I set in on a book, with the air intake hanging off the side of the book and while it gets warm, it does work all night.


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