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  1. #1
    Join Date
    Jul 1999
    Location
    Glen Iris, Vic, Australia
    Posts
    2,196

    Default Anyone Melbourne have iMac crashing 38° yesterday. AC units causing currency spikes?

    My imac shut down about 5 times yesterday.
    The weather got up to 38 outside my window in Glen Iris.
    The room temp was never more the 23.

    I'm wondering if the hot day with people using the AirCons causing spikes in the 240v AC current.

    Anyone else in the area have the same issue?
    iMac late 2012 27". Known power supply card issues with this model.
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

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  3. #2
    rrich Guest

    Default

    Does it happen when you are on battery only?

  4. #3
    Join Date
    Sep 2013
    Location
    Jarrahdale WA
    Posts
    370

    Default

    I've had this, but not that bad.
    Investigating it I found that a build up of that fluff and dust that's normally around the home had reduced the effectiveness of the cooling fan. This could be your issue too, considering it's age. Mine is a 2011.
    Follow the YT videos to get access to the inside and give it a blow or vacuum. Don't be timid. It looks daunting but it's dead easy.
    The hardest part is making sure your glass is absolutely clean before putting it back. Took me three goes!
    If you give it a blow ensure you leave it open for a while after before re-assembling. There is always an amount of moisture in compressor air and this can give your iMac a heart attack it you power up too soon.

  5. #4
    Join Date
    Jul 1999
    Location
    Glen Iris, Vic, Australia
    Posts
    2,196

    Default

    Quote Originally Posted by rrich View Post
    Does it happen when you are on battery only?
    Thanks Rich,
    It's an iMac desktop
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  6. #5
    Join Date
    Jul 1999
    Location
    Glen Iris, Vic, Australia
    Posts
    2,196

    Default

    Quote Originally Posted by david.elliott View Post
    I've had this, but not that bad.
    Investigating it I found that a build up of that fluff and dust that's normally around the home had reduced the effectiveness of the cooling fan. This could be your issue too, considering it's age. Mine is a 2011.
    Follow the YT videos to get access to the inside and give it a blow or vacuum. Don't be timid. It looks daunting but it's dead easy.
    The hardest part is making sure your glass is absolutely clean before putting it back. Took me three goes!
    If you give it a blow ensure you leave it open for a while after before re-assembling. There is always an amount of moisture in compressor air and this can give your iMac a heart attack it you power up too soon.
    Thanks David,
    One would think it would happen continuously if that were the case.
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  7. #6
    rrich Guest

    Default

    Quote Originally Posted by barrysumpter View Post
    Thanks Rich,
    It's an iMac desktop
    It just shows how little a MS man knows about Apple.

    LOL

  8. #7
    Join Date
    Apr 2015
    Location
    Warragul Vic
    Posts
    1,093

    Default

    My iPhone locked up while I was taking pics (in photo mode) of wood yesterday afternoon.
    This is a very rare occurrence and I'm only mentioning it because you asked. Maybe the software? I dunno
    I doubt if they are linked to your experience Barry but maybe they are. I look forward to see what others may say.

  9. #8
    rrich Guest

    Default

    Barry,

    Just a thought here. I don't know if they are even legal in OZ but a power point strip might be the answer. Here they are sold with surge suppressors built in. Is something like that available in Australia? Here they can be had for less than $20 and for the desk top they are life savers.

    Another solution is a UPS (Uninterruptable Power Source) between the power company and the iMac. We were having huge problems with the local AC power some years ago. I had one and it got me through the really bad times. So many times the power would drop for a few seconds but the UPS kept me up and running. Here IIRC the cost as about $200 but the company paid for it as I was working at home several days a week.

  10. #9
    Join Date
    Jul 1999
    Location
    Glen Iris, Vic, Australia
    Posts
    2,196

    Default

    Many thanks rrich,

    Should have posted my attempt at a solution sooner

    Purchased and installed from my trusted electronics guy.

    CyberPower BU650E BACKUP UTILITY SERIES 650VA/390W [BU650E] - CPLOnline
    @ $80

    We'll see what happens on next hot AC day.

    Less than $20US is ~$30AU.
    Fantasy in Aus.

    This one can fit 3 plugs in this one.

    My E Guy is 1K Smarter then I.
    With no hesitation with advice and never condescending.
    (not that anyone here is)
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  11. #10
    Join Date
    Jan 2007
    Location
    Katoomba NSW
    Posts
    4,770

    Default

    Just want to make sure you are aware that the UPS you purchased will only hold up for about 10mins with only the iMac plugged in. Just enough time to let you shut it down properly. It will however provide surge protection no problem.
    No matter how many people turn on AC units it will not cause a current spike. It is also highly unlikely that the local voltage would drop to a point where the iMac power supply would shut down. You may have experienced several brown outs due to problems with the network but I suspect that your iMac power supply may be on the way out.
    Those were the droids I was looking for.
    https://autoblastgates.com.au

  12. #11
    Join Date
    Jul 1999
    Location
    Glen Iris, Vic, Australia
    Posts
    2,196

    Default

    Many thanks.
    Yes, the power supply might be on the way out so soon is incredibly frustrating.
    Can't believe I spent so much money of Steve Jobs "closed system from end to end" BS.

    Just feeling me POS EOM Delta sensitivity to spikes in my own AC on top of local AC units turning on and off might be of note.
    I could swear the iMac was shutting down before we turned our own AC on. But can't be certain now. grrrrrr.

    Have already purchased a proper LiteON replacement Not a POS OEM Delta brand power supply just in case.
    Apple replaced the last POS OEM Delta for around $250Au. Grrrrrr.
    After to and fro-ing for about 4 to 6 months.
    Apple techs guidelines are such BS.
    Less than 2 years ago.

    So I'll replace it myself with a LiteOn instead this time for < $100Au.

    Not looking forward to the stress of doing it myself though.
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  13. #12
    Join Date
    Jul 1999
    Location
    Glen Iris, Vic, Australia
    Posts
    2,196

    Default

    Quote Originally Posted by Euge View Post
    My iPhone locked up while I was taking pics (in photo mode) of wood yesterday afternoon.
    This is a very rare occurrence and I'm only mentioning it because you asked. Maybe the software? I dunno
    I doubt if they are linked to your experience Barry but maybe they are. I look forward to see what others may say.
    What species of wood were you capturing?
    Could be relevant.









    LOL!
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  14. #13
    Join Date
    Jul 1999
    Location
    Glen Iris, Vic, Australia
    Posts
    2,196

    Default

    Quote Originally Posted by NCArcher View Post
    Just want to make sure you are aware that the UPS you purchased will only hold up for about 10mins with only the iMac plugged in. Just enough time to let you shut it down properly. It will however provide surge protection no problem.
    No matter how many people turn on AC units it will not cause a current spike. It is also highly unlikely that the local voltage would drop to a point where the iMac power supply would shut down. You may have experienced several brown outs due to problems with the network but I suspect that your iMac power supply may be on the way out.

    Hoping the UPS will filter out the spikes enough to keep my sensitive POS Delta power card from shutting down.
    We'll see.
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  15. #14
    Join Date
    Jul 1999
    Location
    Glen Iris, Vic, Australia
    Posts
    2,196

    Default

    OK 42° on Wednesday.
    And 44° on Friday.
    No issues at all with the CyberPower BU650E .
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

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