Apple

Out of context: Reply #1943

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  • fadein110

    I have an oldish iMac that still runs quite well for it's age.
    Replaced the harddrive a few years ago and there are a couple of minor screen patches but aside from that, it's a good workhorse still especially for running Logic and music stuff.

    Anyway it has recently started turning it's screen off randomly, the computer is still on it's just the screen that goes off and you have to press the button on back for a couple of seconds to get it back on.

    If you have the screen brightness v.low it doesn't happen.

    Anyway I obviously trawled the forums and someone had suggested it may be a heat issue and to remove SMC Fan Control and install TG Pro which I have done. Have to admit SMC didn't seem to be v.effective any more for some reason and TG Pro is certainly a better tool for that purpose, way more control over stuff.

    So to cut a long story short(!) the screen no longer randomly turns off but I have noticed one of the temps is rather high. When in use the secondary heatsink goes up to around 90-92°C. It displays in red in TG so I presume this is the high end.

    I have tried to find what the top end running temps are for the secondary heatsink but cannot find? Anyone know? Are these temps dangerous?

    I also read it may simply be a build up of dust inside the iMac. Now if this was a PC I'd have the side off the tower in minutes and remove all the dust but as it's an iMac this is obviously a pain in the ass. Do you think this would help the issue though? I guess it cannot hurt and prob a good thing to do anyway. The guy who replaced the hard drive for me said he cleaned it all out as there was a big build up of dust.

    Although old and needs replacing I would like to keep the good girl running for as long as I can. As I say she has served me well and is still a decent machine (aside form issues like this).

    Thoughts anyone?

    Thanks in advance.

    fadein11 0Permalink
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    • Check the processes to see if something is making it run hot. Newer OS updates have had a habit of sometimes screwing with things.face_melter
    • The problem on my old MacBook Pro was 'kernel_task' running at CPU 90%+, had to fix it after each update.face_melter
    • thanks - I will look into that.
      Do you know what the secondary heat sink is? I thought it was to do with the power supply which is kind of what worried me      fadein11
    • in case it's dangerous.fadein11
    • Dust blocks airflow and effects temps. But if it was easy to clean, you'd not need to buy a new mac...shapesalad
    • Probably dustmonospaced
    • yep hopefully. thanks.fadein11
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