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  1. #1
    Replacing 2007 iMac Hardrive

    Member Since
    Mar 22, 2013
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    5
    Replacing 2007 iMac Hardrive
    Hello. The hardrive failed on beloved 2007 iMac. About a week before it failed the top of the aluminum casing kept getting very hot. I'm thinking this was caused by the failing hardrive- but should I consider replacing any fans or anything else while I am inside of there? Any ideas would be helpful.

    I've got my video tutorial from ifixit and instructions and my tools from OWC...I'm ready to go!

  2. #2
    Replacing 2007 iMac Hardrive
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
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    31,502
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.7.5
    Quote Originally Posted by nmosier View Post
    I'm thinking this was caused by the failing hardrive- but should I consider replacing any fans or anything else while I am inside of there? Any ideas would be helpful.
    Probably not. But you won't know until you open things up. If the fan(s) are currently working & not making a lot of noise...then they're probably fine.

    FYI...replacing parts like fans is not a simple matter with Apple computers. In the sense that these are not "off the shelf" parts. If these parts need to be replaced...you need to plan wayyyy ahead of time...and start looking for them.

    But like I said...if the fans are currently working & not noisy (by noisy I mean loud mechanical noises...bad bearings...not loud noise from the fans running at high rpm).

    It's also possible that your iMac us very very dirty inside...and needs to be cleaned.

    Blocked fans = less cooling air = hot iMac.

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  3. #3
    Replacing 2007 iMac Hardrive
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
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    20,066
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    If you have the expertise go for it but cracking an iMac is not a task for beginners. Whilst in there use a very fine paint brush and remove any dust. Canned compressed air will also help.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  4. #4
    Replacing 2007 iMac Hardrive

    Member Since
    Mar 22, 2013
    Posts
    5
    I took it on and was successful! Wasn't actually that hard. I was hoping the heat issue would be taken care of after I cleaned everything out inside- but that doesn't seem to be the case. After just a couple hours of use the top and back casing get very hot. Any ideas?

  5. #5
    Replacing 2007 iMac Hardrive
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
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    20,066
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    Download iStatPro and advise what the heat comes in at.

    http://www.apple.com/downloads/dashb.../istatpro.html
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  6. #6
    Replacing 2007 iMac Hardrive
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    31,502
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.7.5
    Also with what Harry mentioned with iStatPro...take note of the fan rpm's. The rpm's should be pretty high (4000-6000rpm) when the computer is getting hot. If the rpm's are very low...then the fan may not be operating properly.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  7. #7
    Replacing 2007 iMac Hardrive
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,066
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    To give some idea of temperatures on a 2012 iMac 2.7Ghz. Winter Down under, Ambient 17C and all settings are less than 30C. Fans running 1100-1398rpm.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  8. #8
    Replacing 2007 iMac Hardrive
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    31,502
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.7.5
    Quote Originally Posted by harryb2448 View Post
    To give some idea of temperatures on a 2012 iMac 2.7Ghz. Winter Down under, Ambient 17C and all settings are less than 30C. Fans running 1100-1398rpm.
    Great info Harry...thanks for posting!

    - Nick

    p.s. BTW...ambient temp. of 17C...that's only 62.6F! Sell some of that Apple stock...and turn up the heat! Brrrr.
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  9. #9
    Replacing 2007 iMac Hardrive
    chas_m's Avatar
    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    18,971
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    I'm surprised that nobody else has pointed out that the top back of an iMac is *supposed* to get hot -- that is where the heat is being vented!

    This is all perfectly normal and routine operation for the iMac, which uses convection cooling to keep the fan noise at a minimum.

  10. #10
    Replacing 2007 iMac Hardrive
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,292
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    My home office is air conditioned.... but right now my 2011 iMac is showing a CPU temperature of 42 degrees Celsius and CPU fan RPM of 1198. Outside air temperature is currently 92 degrees F. with an expected afternoon high of close to 100 degrees. (Typical for this time of year here in Texas.)

    But chas is right about how an iMac dispels heat. Cooler air is drawn in through the bottom vents and warmer air expelled out the top vents. Very efficient. And by the way, an iMac has three fans.

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