Power hungry? Keep those electrons flowing by replacing your power supply.

  1. Loosen the two captive Phillips screws securing the access door to the iMac.
    • Loosen the two captive Phillips screws securing the access door to the iMac.

    • Remove the access door from the iMac.

    • Before beginning the repair, unplug the computer and press and hold the power switch for 20-30 seconds, to discharge internal capacitors.

    That is a really, really unnecessarily complex way of fitting a new hard drive. Thanks, but no thanks...

    annax - Ответить

    Quote from annax:

    That is a really, really unnecessarily complex way of fitting a new hard drive. Thanks, but no thanks...

    annax, if you can suggest a simpler way we're all ears!

    Jake Simmonds - Ответить

    I found this guide to be very useful. The installation was super easy, especially since I've never opened my iMac before. I was able to skip steps 6, 7, 9, 10 and 14. Wish I had one of those long skinny magnetic torx screwdriver's though. I had to use duct tape to hold the screws on the end of the bit for step 12.

    I used this opportunity to vacuum out the dust with mini attachments. Much needed after 3 years ;0)

    Awesome site!!! Thanks for sharing your knowledge and saving me time and $$$!

    Eric Patten - Ответить

    Yes I did it! thanks for this very good manual

    Philippe d Anfray - Ответить

  2. Remove the following four screws:
    • Remove the following four screws:

      • Three 6 mm T8 Torx.

      • One 8 mm T8 Torx.

    T8's on the MA590LL 17" iMac.

    Endareth - Ответить

    8mm screw is 2nd from left - useful when reassembly

    Stefano Speriani - Ответить

    • Flip your iMac over and lay it stand-side down on a flat surface.

    • To lift the front bezel off the iMac, simultaneously:

      • Use your thumbs to press in the RAM arms and hold the iMac down.

      • Use your index fingers to pull the small bridge of material on the front bezel toward yourself.

      • Pull the Front bezel up with your index fingers.

    • Once the small bridge of material has cleared the RAM arms, lift the front bezel by its lower edge just enough to clear the bottom edge of the rear case.

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    • Re-orient your iMac so it sits upright on the stand.

    • Insert a plastic card up into the corner of the air vent slot near the top of the rear case.

    • Push the card toward the top of the iMac to release the front bezel latch.

    • Pull the front bezel away from the rear case.

    • Repeat this process for the other side of the front bezel.

    • It may be necessary to apply several layers of duct tape to the top of the access card to aid in releasing the latches.

    • If the bezel refuses to release, try pressing the lower edge back onto the rear case and repeat this opening process.

    Apple uses a powerful magnet to release these latches, but the official tool is not available. If you have access to a few failed hard drives, you can take out the magnets from those, and stack them up to have a magnet strong enough to easily open these latches.

    Simply place the magnet on an upper corner of the machine, and when you hear a click, gently pull the corner of the front case forward. Repeat the process for the other upper corner. Use care not to pull on the iSight cables.

    Note: Use care when handling the hard drive magnets, they are powerful, and you don't want them to snap together on your fingers. OUCH!

    Zaphod - Ответить

    You can use a credit card. Mine survived, though it did get a little bent.

    David Bendory - Ответить

    I used two credit cards for extra thickness and the latches released very easily.

    James French - Ответить

    The magnetic latches are about 2-3 cm from the left and right edges right at the top edge of the case. I just ran a rare-earth magnet over the from of the bezel in this area. You can hear it click when it disengages. RadioShack has these kind of magnets for $3, the call them "super magnets".

    James - Ответить

    This was a nuisance. Had to really move the card around to get it to finally release.

    Tim Dougherty - Ответить

    Be very careful not to damage the metal clips with a credit card. My iMac was very stubborn and I ended up bending the clips in a way they cannot be bent back. The clips do still work and the front bezel does still go back on, however it no longer sits flush with the back of the iMac.

    Gary Lefebvre - Ответить

    • Lay your iMac stand-side down on a table.

    • Lift the front bezel from its lower edge and rotate it away from the rest of your iMac, minding the RAM arms that may get caught.

    • Lay the front bezel above the rest of the iMac.

    I found that it is much easier if you remove the top of the case first, then lay computer back on the stand & remove the bottom as directed.

    G A Long - Ответить

    • If necessary, remove the piece of kapton tape(it is ok to toss this) wrapped around the microphone and camera cables.

    I was able to skip Steps 6 & 7 entirely. The microphone and camera cables had enough slack to flip the front cover off and lie it flat above the rest of the computer.

    Carly Hobeef - Ответить

    Step 4 is completely unnessecary. Just lift the bezel up and wiggle it until the metal clips let go. Then lift the bezel straight up.

    Cloudsurfer - Ответить

    • Disconnect both the camera and microphone cables.

    Make sure the white wire is on the same side of both parts of the connector before reconnecting.

    It is possible to reconnect the microphone cable in the wrong/reversed orientation with the connector. The microphone will still work but will be muted and result in a "tinny" sound on the receiver's end.

    creecher - Ответить

    Can anyone ID these connectors (at least the camera connector) so that I may make an extension (to move the camera out and re-house it myself). I probably have the gear to do the mic already.

    Is the camera connector some standard I can order M & F versions online to terminate to an extension cable?

    hutchwilco - Ответить

    • Peel up the lower EMI shield from the rear case.

    • It is only necessary to peel the shield up from three sides. Leave it attached to the display.

    • We have found it helpful to tape the EMI shield against the display to keep it out of the way.

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  3. Spread Fixmas Cheer
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    Spread Fixmas Cheer
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    • Remove the two 4.8 mm T6 Torx screws securing the display data cable to the logic board.

    • Grab the display data cable connector by its black tab and pull it straight up off the logic board.

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    • Inverter cable on 24inch iMac pulls off to the left.

    • Pull the inverter cable connector straight up off its socket on the logic board.

    The inverter connector had a different location for me. It was situated next to the top left corner of the right speaker, just under the display. I didn't figure this out until I actually lifted the display off the computer.

    Cloudsurfer - Ответить

    My 17" iMac also has the inverter cable. It located in the upper right just below the display.

    Clinton - Ответить

    I couldnt get this cable off, so I skipped this step. If you have this problem, just proceed; when you get to step 13, lift the display carefully as this cable will still be attached. You'll now easily be able to grip the connector and remove it.

    David Bendory - Ответить

    • Peel back the aluminum EMI tape from the two vertical edges of the display.

    • During reassembly, it is helpful to use several small strips of tape to hold the EMI shielding along the left and right edges of the display footprint out of the way before lowering the display into the rear case of your iMac.

    Only peel back the black EMI tape that overlaps the edge of the display, not the silver tape on the display itself.

    Odesseus - Ответить

    The above note sounds as if one should peel the aluminum-foil colored tape back from the frame. Do NOT do this; instead, peel the BLACK-colored aluminum tape back from the display frame to reveal the crevice between the display and the case and the mounting screws you are about to remove.

    Byron Bray - Ответить

    I didn't actually need to peel anything at all. The screws would have been visible had I looked more carefully.

    David Bendory - Ответить

    • Allow the EMI shield to hang down from the display.

    • Remove the four 8 mm with 2 mm thick head coarse-thread T10 Torx screws securing the display to the rear case.

    • These screws are recessed, so a thin screwdriver such as this is essential for removal. Bit drivers tend to be too short for this application.

    • It is strongly recommended to use a magnetized screwdriver so the screws won't fall into the iMac.

    To put the T10 screws back, you'll need a magnetic head T10 screwdriver or a long, tweezer-like device found in a good set of computer tools. The screws are WAY down there and it is difficult if not impossible without the right tools.

    Monkee - Ответить

    If your thin torx driver is not magnetized, you can hold another, magnetized, driver against it as a temporary solution.

    Si Brindley - Ответить

    If you really want to tackle it without proper tools: with a non-magnetised thin torx loosen the screw till its ready to come out, then wrap a little bit of duct tape (sticky side out) around the head of a spare thin screwdriver, gently push the duct taped screwdriver on top of the loosened screw. The magic tape will lift the screws out.

    When re-assembling, it's also a good way to fish out the screws that missed the holes completely when your expert fingers skills are classed as clumsy.

    Mark - Ответить

    You must have a magnetized Torx 10, 2 to 3 inches in length to safely get these screws out. Fortunately if you have the T10 you can magnetize it with your iMac.

    Inside the front bezel are two magnets that hold your apple remote to the case, simply tap the T10 to the larger magnet 3 or 4 times and test it's strength in holding a weighty screw. You are good to go. I did this and the scary lose a screw into the iMac was diminished with a firm hold in both removal and install.

    rwpete63 - Ответить

    If you don't have a magnetic screwdriver or they are aluminum screws, you can use this old mechanics tip: Use a small piece of paper or celophane tape on the head of the screw, then press the screwdriver into it, this creates a nice snug hold so you can reinstall the screws.

    Greg Olson - Ответить

    I was able to slightly bend the plastic case to get my driver to seat. This was the most challenging part of the teardown and reassembly because I did not have the proper tool.

    Tim Dougherty - Ответить

    • Lift the display from its lower edge and pull it toward yourself to peel off the EMI shield attached to its top edge.

    • Be mindful of any cables that may get caught during removal.

    Steps 14 & 15; If you remove the top screw, and just loosen the bottom screw you can rotate the optical drive clip out of the way, tighten it, then screw the top screw back in to hold the logic board down for later trying to remove the connector. You also save three more parts kicking around on the desktop.

    dentoni - Ответить

    • De-route the bundle of power supply cables from behind the hard drive bracket.

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    • A hard drive thermal sensor may be present on some models. If your logic board is missing the hard drive thermal sensor socket highlighted in red in the first picture, skip this step.

    • Pull the hard drive thermal sensor connector away from its socket on the logic board.

    • Pull this connector parallel to the face of the logic board toward the top edge of the iMac.

    • Use a spudger to pry the thermal sensor and adhesive off the hard drive and install it in the same location on the replacement drive.

    There was a thermal sensor attached to the HD. You can peel it off and glue it on the new HD and attach the connector back again.

    map - Ответить

    I think there is no need to mess whit the connector. just peel it off and glue it on. the connector is very week.

    thanks for ever ifixit!

    sebalancea - Ответить

    My thermal sensor was magnetised. I just pulled it off my old HD and put it on my new one. It sticks perfectly to the metal casing.

    Cloudsurfer - Ответить

    There was a thermal sensor attached to my previous HD but not to the new one. But without this sensor, the iMac was down :-( (logic board ?)

    I was forced to re-install the old HD with the temp sensor on.

    Except this point, related to my iMac, thanks ifixit for this great manual

    Jerome - Ответить

    I found it easier to take the sensor off the Hard Drive, not the logic board. The stickiness holding it place on the old drive was sticky enough to hold it in place on the new drive.

    Leif - Ответить

    • Press the hard drive bracket down to free it from the rear case, then rotate the top of the drive toward yourself.

    • Pressing the top of the hard drive bracket down to release it from the rear case requires a substantial amount of force, so we recommend laying your iMac stand-side down on a table to avoid knocking it over.

    • If you have trouble releasing the hard drive bracket, it can be removed from the hard drive, by removing the two T8 or T10 Torx screws securing the bracket to the drive.

    I was applying a considerable amount of force and was not getting anywhere and I was afraid it was going to suddenly release and the resulting jerk would break something else. I noticed that all I was trying to do is get a plastic tap to go past a metal plate. There was plenty of room with no other components around so I stuck a medium screw driver behind the plastic latch and applied a small amount of pressure and it unlatched very nicely. I pried on one side and then the other to release it on both sides. For me this method worked a lot better.

    flyingmonkey1 - Ответить

    When I was trying to remove this bracket, it broke right off!! do you think i could super glue it back together, or order a new one? or does it even need one?

    danielle - Ответить

    The drive bracket wasn't moving until i placed my fingers exactly as shown in the picture and firmly applied force. Then it moved easily.

    Clinton - Ответить

    I also struggled trying to get the bracket loose by pressing down. I finally took FlyingMonkey's suggestion about the screwdriver and it came right off.

    Rachael Whitaker - Ответить

    I too was afraid I would break the bracket. I removed the screws that held the bracket to the hard drive. This allowed the hard drive and bracket to come right out.

    Roscoville - Ответить

    • Lift the hard drive off its lower pins and pull it out of the rear case, minding the power supply cables that may get caught.

    • When reinstalling your hard drive, be careful not to push the two rubber grommets through their holes in the chassis. Retrieving them would require removing the logic board.

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    • Insert a spudger between the SATA connectors and twist it to separate the connector from the hard drive.

    • Disconnect both SATA connectors.

    I really didn't need a spudger to pull the cables off.

    Cloudsurfer - Ответить

    • The next few steps bring your hands close to the exposed face of the power supply. Do not touch the face of the power supply to avoid a high voltage shock from the many large capacitors attached to the board.

    • Unplug the power supply cable bundle from the logic board by simultaneously depressing the locking mechanism (toward yourself) with a spudger and pulling the connector away from its socket.

    • The locking mechanism faces the rear case.

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    • If necessary, remove the piece of tape holding the AC-in cable under the chassis.

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    • Use a pair of tweezers to pull the AC-in cable out from underneath the chassis.

    • Disconnect the AC-in cable by simultaneously depressing its locking mechanism and pulling the connector away from its socket.

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    • Remove the four T10 Torx screws securing the power supply to the rear case.

    • Two 14mm fine-thread screws on the right.

    • One 14mm coarse-thread screw in lower left corner.

    • One 20mm coarse-thread screw in upper left corner.

    Power supply seems to differ – is split in two parts.

    Peter Pavek - Ответить

    for re assembly I found it was easier to reattach the cables of the power supply before screwing the latter into place, remembering to route the smaller cable under the chassis

    osdoctor1 - Ответить

    • Lift the power supply out of the rear case, minding the AC inlet cable that may get caught on the chassis.

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To reassemble your device, follow these instructions in reverse order.

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Комментариев: 5

It was quite easy, but a little fiddly. I didn't need to remove the hardrive to replace the power supply.

cjmaxwell - Ответить

The PSU in the 17” is smaller than shown and has the DC - DC convertor above it.

Marcus Evans - Ответить

DC - DC convertor is above the psu in the 17” model and the psu is half the size than that shown.

Marcus Evans - Ответить

I wanna try this because my imac no longer turns on, but i dont know if its my power supply. I press the power button and it turns on barely for a second and then turn off completely. it makes the sound when a mac turns on and the screen turns on for a sec…..what should I do?

Jess - Ответить

@jess : Check this out: My iMac will not turn on? – it explains how to read the diagnostic LEDs.

Ernst de Haan - Ответить

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