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iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement

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  1. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Display: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
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    iMac Intel 21.5" Cardboard Service Wedge
    $4.99
    crwdns2942207:0crwdne2942207:0
    • With the hinge free to move, the iMac will be unbalanced and hard to work on. Repairs can be completed as shown, but are faster and easier with an iMac service wedge.

    • If you are using the iFixit cardboard service wedge, follow these assembly directions to put it together.

    • Before beginning any work on your iMac: Unplug the computer and press and hold the power button for ten seconds to discharge the power supply's capacitors.

    • Be very careful not to touch the capacitor leads or any exposed solder joints on the back of the power supply. Only handle the board by the edges.

  2. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:02crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:02crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Starting on the left of the display, near the power button, insert the iMac Opening Tool into the gap between the glass panel and the rear enclosure.

    • The hub on the iMac Opening Tool will keep you from pushing the wheel in too far. If using a different tool, insert no more than 3/8" into the display. Otherwise, you risk severing antenna cables and causing serious damage.

    • Be gentle! The glass may crack if pried too much. Use a hairdryer to heat the edges and loosen the tape if the room temperatures are low.

  3. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:03crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:03crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:03crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Use the tool like a pizza cutter—roll it along through the gap, and it will cut the foam adhesive through the center.

    • Be sure to always push with the handle behind the cutting wheel. If you pull, the wheel might get pulled out of the handle.

    • Run the tool up along the left side of the display.

  4. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:04crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:04crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Continue running the tool up around the top left corner.

  5. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:05crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:05crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Cut the adhesive along the top left of the display.

  6. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:06crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:06crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Continue along the top of the display.

    • You may want to run the tool back and forth through what you've already cut a few times, to ensure you get as much of the adhesive separated as possible.

  7. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:07crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:07crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:07crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Push the tool around the top right corner of the display.

  8. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:08crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:08crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Wheel the tool down along the right side of the display.

  9. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:09crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:09crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Finish pushing the opening tool to the bottom of the right side of the display.

    • At this point, you'll want to run the tool back around the entire display, to ensure you cut as much adhesive as possible.

  10. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:010crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:010crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:010crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    crwdns2935267:0crwdne2935267:0
    Plastic Cards
    $2.99
    crwdns2942207:0crwdne2942207:0
    • While the opening tool cut most of the adhesive, the display will still be slightly adhered to the case. A plastic card will be necessary to free up the last of this adhesive.

    • Set the iMac face-up on a table.

    • Starting from the top right corner of the iMac, wedge a plastic card between the display and frame.

    • Be careful not to insert the plastic card more than 3/8", or you may damage internal components.

  11. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:011crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:011crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Gently twist the plastic card sideways to create a gap between the display and frame.

    • Move slowly and be careful not to stress the display glass too much—you only need to make a gap of about 1/4".

  12. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:012crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:012crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:012crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Slide the card toward the center of the display to cut any of the remaining adhesive along the top right corner of the iMac.

    • Be sure to stop before the iSight camera, or you may damage it.

  13. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:013crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:013crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Wedge the plastic card into the top right corner once again and let it stay there to keep the adhesive from resettling.

  14. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:014crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:014crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:014crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Insert a second plastic card into the gap between the display and frame located at the top left corner of the iMac.

  15. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:015crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:015crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Gently twist the card upward, slightly increasing the space between the display and frame.

    • As with the other side, twist slowly to allow the adhesive time to separate, and be careful not to over-stress the display glass.

  16. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:016crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:016crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:016crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Slide the plastic card toward the center, again stopping just before the iSight camera.

  17. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:017crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:017crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Wedge the plastic card back into the top left corner.

  18. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:018crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:018crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:018crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • With both plastic cards inserted as shown near the corners, gently twist the cards sideways to increase the gap between display and case.

    • If there are any sections that seem to stick and won't separate, stop twisting and use one of the cards to cut the remaining adhesive.

    • Begin to lift the top of the display up from the frame.

    • Only lift the display a few inches—the display data and power cables are still connected to the logic board.

  19. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:019crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:019crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • While holding the display up with one hand, use the other hand to unplug the display power cable. Make sure that you pull the cable out from the plastic tab, and not by pulling on the color wires.

    • Lift the display up enough to have easy access to the connector, but not so much that you stretch the cables and stress their connections (about 8").

  20. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:020crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:020crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:020crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Use the tip of a spudger to flip up the metal retaining bracket on the display data cable.

    • Carefully pull the display data cable from its socket on the logic board.

    • Be sure to pull the display data cable connector straight out of its socket.

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    • Lift the display up to a near-vertical position.

    • At this point there is still a strip of adhesive along the bottom of the display, that will hold the display to the frame like a hinge. You can loosen this adhesive by working the display up and down a few times.

  22. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:022crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:022crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:022crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Be very careful not to touch the capacitor leads or any exposed solder joints on the back of the power supply (boxed in red).

    • Grasp the small tab at the end of one of the bottom edge display adhesive strips and pull the adhesive toward the top of the iMac to remove it.

    • Repeat this step with the other adhesive strip and remove it.

    • If either adhesive strip breaks before it's removed, use a plastic card to slice through the remaining adhesive.

  23. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:023crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:023crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:023crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Lift the display up from the frame and remove it from the iMac.

    • It may be necessary to slowly lift from one side, to peel against the remaining adhesive.

    • Be very careful handling the display—it's big, heavy, and made of glass.

    • During reassembly, head over to our display adhesive guide to install the new adhesive.

  24. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Lower Support Bracket: crwdns2935265:024crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Lower Support Bracket: crwdns2935265:024crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove the following five Phillips screws holding the lower support bracket in place:

    • Four 3.2 mm screws

    • One 1.7 mm screw

    • You may need to peel up the display adhesive lining the bottom edge of the iMac enclosure to access the screws.

  25. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:025crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the lower support bracket (a.k.a. "chin strap") from the iMac enclosure.

  26. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Hard Drive Brackets: crwdns2935265:026crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the following T10 Torx screws securing the hard drive brackets to the iMac:

    • Two 21 mm screws

    • One 9 mm screw

    • One 27 mm screw

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    • Remove the left and right hard drive brackets from the iMac.

  28. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Power Supply: crwdns2935265:028crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Power Supply: crwdns2935265:028crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Power Supply: crwdns2935265:028crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • 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 or any of the exposed solder. Touching it risks a high voltage shock from the many large capacitors attached to the board.

    • Use the tip of a spudger to push each side of the power button cable connector and gently walk it out of its socket.

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    • Use the tip of a spudger to push each side of the power supply control cable connector and gently walk it out of its socket.

  30. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:030crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the two 7.2 mm T10 Torx screws securing the power supply to the rear enclosure.

    • In newer model iMacs these are 7.2 mm T8 Torx screws.

    • During reassembly, be careful not to trap the power button wire behind the board.

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    • When working on the power supply, be very careful not to touch the capacitor leads or any exposed solder joints on the back of the power supply. Only handle the board by the edges.

    • Tilt the power supply forward.

  32. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:032crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:032crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:032crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Pull the power supply slightly up and out from the rear enclosure.

    • Rotate the power supply counterclockwise, lifting the right side up about an inch higher than the left.

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    • Slide the power supply to the right to clear the screw posts on the rear enclosure.

  34. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:034crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:034crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:034crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Rock the power supply forward and remove it from its recess in the rear enclosure.

    • Do not try to completely remove the power supply from the iMac yet—it is still connected to the logic board.

  35. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:035crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:035crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Be very careful not to touch the capacitor leads or any exposed solder joints on the back of the power supply. Only handle the board by the edges.

    • Flip the power supply over to access the DC power cable connection behind the logic board.

    • Squeeze the tab on the back side of the DC power cable connector and pull it straight out of its socket on the back of the logic board.

  36. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:036crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:036crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:036crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • You may find it helpful to set the iMac down on its back for the next couple of steps.

    • Use the flat end of a spudger to press the clip on the side of the AC inlet cable connector inward.

    • While pressing on the release clip with the spudger, grasp the AC inlet cable, and pull the connector straight out of its socket.

  37. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:037crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the power supply from the iMac.

  38. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Fan: crwdns2935265:038crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Fan: crwdns2935265:038crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Gently pull the fan cable connector straight away from its socket on the logic board.

  39. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:039crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the three 10 mm T10 Torx screws securing the fan to the rear enclosure.

    • The uppermost screw has a rubber standoff adhered to its head to support the display—leave this in place.

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    • Remove the fan from the iMac.

  41. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Hard Drive Assembly: crwdns2935265:041crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Hard Drive Assembly: crwdns2935265:041crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Hard Drive Assembly: crwdns2935265:041crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Lift the hard drive from the edge nearest the logic board and pull it slightly out of its recess.

    • The hard drive is attached by a single SATA power/data cable—do not attempt to fully remove it from the iMac yet.

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    • Use a spudger to disconnect the single SATA power and data combo cable by gently prying its large plastic connector away from the hard drive.

  43. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:043crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the hard drive assembly from the iMac.

  44. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, Hard Drive Tray: crwdns2935265:044crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the 7.3 mm T8 Torx screw securing the hard drive tray to the rear enclosure.

  45. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:045crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the hard drive tray.

  46. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, RAM: crwdns2935265:046crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement, RAM: crwdns2935265:046crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Gently pull the right speaker cable connector straight down and out of its socket on the logic board.

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    • Gently pull the left speaker cable straight out of its socket on the logic board.

  48. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:048crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • De-route the left speaker cable by pulling it straight up out of the retaining clip in the back of the rear enclosure.

  49. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:049crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:049crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Similarly to the previous step, de-route the SATA and power cables by pulling the braid straight up out of the retaining clip.

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    • Peel up the piece of tape connecting the left speaker connector to the SATA power and data cables.

  51. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:051crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:051crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:051crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Flip up the metal retaining bracket on the FaceTime camera cable connector.

    • Pull the FaceTime camera cable straight out of its socket on the logic board.

    • This is a delicate connector that can be easily damaged.

  52. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:052crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the two 4.0 mm T5 Torx screws securing the four antenna connectors to the AirPort/Bluetooth card.

  53. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:053crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:053crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:053crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Disconnect all four antenna connectors by prying them straight up from their sockets on the AirPort/Bluetooth card.

  54. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:054crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:054crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:054crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Use the flat edge of a spudger to pry the headphone jack cable connector from its socket on the logic board.

    • This connector is located on the bottom right edge of the logic board, near the right speaker.

    • Push the cable up and out of the way of the logic board.

  55. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:055crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Peel off the tape covering the exhaust duct.

  56. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:056crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the following T8 Torx screws securing the exhaust duct to the rear enclosure:

    • Two 6.2 mm screws

    • Two 4.7 mm screws

  57. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:057crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:057crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:057crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
  58. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:058crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the four 7.3 mm T8 Torx screws securing the logic board to the rear enclosure.

  59. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:059crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:059crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Tilt the top of the logic board away from the rear enclosure.

  60. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:060crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • When removing and installing the logic board, take care not to damage the delicate microphone ribbon cable at the bottom left.

    • Lift the logic board straight up and out of the iMac.

    • Be careful not to snag the board on any of the rear enclosure's screw posts.

  61. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:061crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Handling the board by the edges, flip the logic board over to access the two RAM modules.

  62. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:062crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:062crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Two clips secure the RAM module in place, one on each side. Using your fingers, spread the clips away from the RAM module.

    • When released, the RAM module will pop up at a slight angle.

  63. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:063crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:063crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Lift the RAM module to an angle of about 30 degrees and slide it out.

    • When handling the RAM module, touch only the outside edges. Take care not to touch the gold-colored contact points along the bottom edge.

    • To install a new RAM module, slide it in place at about the same angle until it is snug, and then swing it downward until the two clips snap into place.

  64. iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:064crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement: crwdns2935265:064crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • The original RAM module closer to the logic board has a thermal pad adhered to its top side (facing away from the logic board, between the two DIMMs).

    • Peel off and transfer the thermal pad from the original RAM stick to your replacement RAM before you install it in the lower slot.

crwdns2915888:0crwdne2915888:0

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

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Evan Noronha

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223 163 crwdns2915208:0crwdne2915208:0

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crwdns2944067:077crwdne2944067:0

An excellent guide - many thanks. The logic board was tricksy to get out - the card reader was jamming on the casing, but it came out with care. It's easy to trap the microphone cable and the power button cables when re-assembling, so they're worth looking out for. Successfully replaced the RAM and installed an SSD at the same time - many thanks.

Dave Hallett - crwdns2934203:0crwdne2934203:0

Can a SSD or fusion drive be put in the place where the normal hard drive was?

Cory Vinyard - crwdns2934203:0crwdne2934203:0

An ssd can yes - that's what I did at the same time as upgrading the ram. As long as it's a 2.5" ssd it should be fine. The Samsung ssd I used was a but thinner than the hard drive that came out but that doesn't affect anything really. You'll need to either have a bootable clone of your drive, or install Sierra from a USB stick you've already prepared (which is what I did).

Dave Hallett -

A Fusion drive is the terminology used by Apple when the use a board soldered 120ish Gb storage and a standard 1Tb 2.5 inch drive, and bind them together, if you throw in a 1Tb SSD in place of the existing standard hard drive you end up with 2 drives when you begin installation, you can find the instructions to merge the onboard and the new SSD back together again, and boy does it transform these machines, absolute pig with a factory fusion setup.

Grant Taylor -

I also upgraded my hard-drive to a 512 GB Samsung SSD successfully along with installing the 32 GB of RAM. The guide was great, but I have a two comments.

1) The screws that hold the antenna connectors (Step 52) are were very tightly screwed into the board, and it is easy to strip the head of the screw. I stripped one of the screws… Luckily, it was easy to just pull up on the bluetooth/AirPort card and slide it out from its slot on the main board. Thus, an option to removing all the antenna wires, is to just pull the bluetooth/Airport card out. It was quite easy to slip back into the correct spot when reassembling as well.

2) It was only after I completed the repair that I realized that the top of the nice screwdriver provided in the repair kit contained more hidden bits!

Brad Doble - crwdns2934203:0crwdne2934203:0

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