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iMac Intel 21.5" EMC 2544 Heat Sink Replacement

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Use this guide to replace the heat sink.

Neye ihtiyacın var

  1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Display: adım 1, 1 resimden 1.
    Bu adımda kullanılan alet:
    iMac Intel 21.5" Cardboard Service Wedge
    $4.99
    Satın Al

    • 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.

    Düzenle

  2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 2, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 2, 2 resimden 2.

    • 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.

    Düzenle

  3. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 3, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 3, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 3, 3 resimden 3.

    • 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.

    Düzenle

  4. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 4, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 4, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 4, 3 resimden 3.

    • Continue running the tool up around the top left corner.

    Düzenle

  5. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 5, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 5, 2 resimden 2.

    • Cut the adhesive along the top left of the display.

    Düzenle

  6. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 6, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 6, 2 resimden 2.

    • 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.

    Düzenle

  7. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 7, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 7, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 7, 3 resimden 3.

    • Push the tool around the top right corner of the display.

    Düzenle

  8. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 8, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 8, 2 resimden 2.

    • Wheel the tool down along the right side of the display.

    Düzenle

  9. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 9, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 9, 2 resimden 2.

    • 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.

    Düzenle

  10. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 10, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 10, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 10, 3 resimden 3.
    Bu adımda kullanılan alet:
    Plastic Cards
    $2.99
    Satın Al

    • 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.

    Düzenle

  11. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 11, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 11, 2 resimden 2.

    • 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".

    Düzenle

  12. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 12, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 12, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 12, 3 resimden 3.

    • 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.

    Düzenle

  13. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 13, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 13, 2 resimden 2.

    • Wedge the plastic card into the top right corner once again and let it stay there to keep the adhesive from resettling.

    Düzenle

  14. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 14, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 14, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 14, 3 resimden 3.

    • Insert a second plastic card into the gap between the display and frame located at the top left corner of the iMac.

    Düzenle

  15. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 15, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 15, 2 resimden 2.

    • 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.

    Düzenle

  16. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 16, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 16, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 16, 3 resimden 3.

    • Slide the plastic card toward the center, again stopping just before the iSight camera.

    Düzenle

  17. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 17, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 17, 2 resimden 2.

    • Wedge the plastic card back into the top left corner.

    Düzenle

  18. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 18, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 18, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 18, 3 resimden 3.

    • 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.

    Düzenle

  19. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 19, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 19, 2 resimden 2.

    • 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").

    Düzenle

  20. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 20, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 20, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 20, 3 resimden 3.

    • 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.

    Düzenle

  21. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 21, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 21, 2 resimden 2.

    • 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.

    Düzenle

  22. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 22, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 22, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 22, 3 resimden 3.

    • 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.

    Düzenle

  23. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 23, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 23, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 23, 3 resimden 3.

    • 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.

    Düzenle

  24. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Lower Support Bracket: adım 24, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Lower Support Bracket: adım 24, 2 resimden 2.

    • Remove the following five Phillips screws holding the lower support bracket in place:

    • Four 3.2 mm screws

    • One 1.7 mm screw

    • On at least some EMC 2544 machines, all five screws are the same size.

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

    Düzenle

  26. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 25, 1 resimden 1.

    • Remove the lower support bracket from the iMac enclosure.

    Düzenle

  27. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Right Speaker: adım 26, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Right Speaker: adım 26, 2 resimden 2.

    • Use a spudger to loosen the right speaker cable's connector from its socket on the logic board.

    • It is useful to push downward on both short sides of the connector to "walk" it out of its socket. Be careful with the corners of the connectors, they can be easily broken off.

    • Pull the connector downwards to remove it from its socket.

    Düzenle

  28. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 27, 1 resimden 1.

    • Remove the two 10.0 mm T10 screws securing the right speaker to the rear enclosure.

    Düzenle

  29. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 28, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 28, 2 resimden 2.

    • Pull the top of the right speaker away from the rear enclosure, about half an inch, to expose the antenna cable running down its right side.

    Düzenle

  30. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 29, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 29, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 29, 3 resimden 3.

    • Insert the tip of a spudger between the right speaker and the antenna cable that is routed into the speaker's right side.

    • Run the spudger down along the right side of the speaker to pry the antenna cable from its channel in the right speaker.

    Düzenle

  31. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 30, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 30, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 30, 3 resimden 3.

    • Pull the right speaker straight up about an inch, toward the top of the iMac.

    • Lift the right speaker straight up and remove it from the iMac. This may take some force, both hands and rocking the speaker right and left to get it out.

    Düzenle

  32. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Hard Drive Brackets: adım 31, 1 resimden 1.

    • Remove the following screws securing the hard drive bracket to the rear enclosure:

    • Two 21 mm T10 Torx screws from the left-hand hard drive bracket.

    • One 9 mm T10 Torx screw.

    • One 27 mm T10 Torx screw.

    Düzenle

  33. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 32, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 32, 2 resimden 2.

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

    Düzenle

  34. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Power Supply: adım 33, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Power Supply: adım 33, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Power Supply: adım 33, 3 resimden 3.

    • 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.

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

    Düzenle

  35. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 34, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 34, 2 resimden 2.

    • Gently push upward on each side of the power supply control cable connector with the tip of a spudger to gently "walk" it out of its socket.

    Düzenle

  36. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 35, 1 resimden 1.

    • Remove the two 7.2 mm T10 screws securing the power supply to the rear enclosure.

    Düzenle

  37. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 36, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 36, 2 resimden 2.

    • 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.

    Düzenle

  38. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 37, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 37, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 37, 3 resimden 3.

    • 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.

    Düzenle

  39. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 38, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 38, 2 resimden 2.

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

    Düzenle

  40. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 39, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 39, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 39, 3 resimden 3.

    • 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.

    Düzenle

  41. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 40, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 40, 2 resimden 2.

    • 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 top of the power supply towards you to access the DC power cable connection behind the logic board.

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

    Düzenle

  42. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 41, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 41, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 41, 3 resimden 3.

    • You may find it helpful to set the iMac down on its back on the table for the next couple of steps.

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

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

    Düzenle

  43. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 42, 1 resimden 1.

    • Remove the power supply from the iMac.

    Düzenle

  44. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Fan: adım 43, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Fan: adım 43, 2 resimden 2.

    • Gently pull the fan cable connector straight away from its socket on the logic board.

    Düzenle

  45. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 44, 1 resimden 1.

    • Remove the three 12.3 mm T10 shoulder screws securing the fan to the rear enclosure.

    Düzenle

  46. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 45, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 45, 2 resimden 2.

    • Remove the fan from the iMac.

    Düzenle

  47. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Hard Drive: adım 46, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Hard Drive: adım 46, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Hard Drive: adım 46, 3 resimden 3.

    • 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 two cables, do not attempt to fully remove it from the iMac.

    Düzenle

  48. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 47, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 47, 2 resimden 2.

    • Disconnect the SATA power cable.

    Düzenle

  49. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 48, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 48, 2 resimden 2.

    • Unplug the SATA data cable from the hard drive.

    Düzenle

  50. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 49, 1 resimden 1.

    • Remove the hard drive from the iMac.

    Düzenle

  51. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Hard Drive Tray: adım 50, 1 resimden 1.

    • Remove the single 7.2 mm T10 screw securing the hard drive tray to the rear enclosure.

    Düzenle

  52. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 51, 1 resimden 1.

    • Remove the hard drive tray from the rear enclosure.

    Düzenle

  53. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Logic Board Assembly: adım 52, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Logic Board Assembly: adım 52, 2 resimden 2.

    • Push on each side of the left speaker cable connector with the tip of a spudger and gently "walk" it out of its socket.

    Düzenle

  54. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 53, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 53, 2 resimden 2.

    • De-route the left speaker cable by pulling it straight up out of the retaining clip in the back of the rear enclosure.

    Düzenle

  55. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 54, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 54, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 54, 3 resimden 3.

    • In a similar fashion as the previous step, de-route the SATA data and power cables up out of the retaining clip.

    Düzenle

  56. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 55, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 55, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 55, 3 resimden 3.

    • Use the flat edge of a spudger to flip up the metal retaining bracket on the iSight camera cable connector.

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

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

    Düzenle

  57. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 56, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 56, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 56, 3 resimden 3.

    • Use the flat edge of a spudger to disconnect each of the four antenna connectors from the AirPort/Bluetooth card.

    • Note the original positions for each connector when reconnecting the cables.

    Düzenle

  58. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 57, 1 resimden 1.

    • If brackets secure the four antenna cables, remove the two T5 Torx screws from the brackets.

    Düzenle

  59. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 58, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 58, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 58, 3 resimden 3.

    • Use the flat edge of a spudger to pry the headphone jack cable connector from its socket on the logic board.

    • Push the cable slightly to the right.

    Düzenle

  60. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 59, 1 resimden 1.

    • Remove the following screws securing the exhaust duct to the rear enclosure:

    • Two 6.3 mm T8 screws

    • Two 4.7 mm T8 screws

    Düzenle

  61. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 60, 1 resimden 1.

    • Remove the four 7.2 mm T10 screws securing the logic board to the rear enclosure.

    • Depending on the age and model of your iMac, a T9 driver may work best.

    Düzenle

  62. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 61, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 61, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 61, 3 resimden 3.

    • Tilt the top of the logic board away from the rear enclosure.

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

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

    • The I/O boards at the bottom of the logic board will be the greatest challenge. It is recommended to pull gently to avoid any damage.

    • During reassembly of the logic board, pay attention to the position of the I/O connectors. When the board is back in the case, insert a USB or Thunderbolt cable into one of the connectors to align it perfectly.

    Düzenle

  63. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, RAM: adım 62, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, RAM: adım 62, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, RAM: adım 62, 3 resimden 3.

    • Release the tabs on each side of the RAM module by simultaneously pushing each tab away.

    • The RAM module should pop up slightly from its socket.

    • Grab the top left and right corners of the RAM module and carefully pull it straight out of its socket.

    • Repeat the process to remove additional RAM modules as necessary.

    Düzenle

  64. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Heat Sink Assembly: adım 63, 3 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Heat Sink Assembly: adım 63, 3 resimden 2. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Heat Sink Assembly: adım 63, 3 resimden 3.

    • Disconnect and remove the SATA data and power cables from the logic board.

    Düzenle

  65. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 64, 1 resimden 1.

    • Remove the four 12 mm T10 shoulder screws from the spring plate behind the CPU.

    Düzenle

  66. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 65, 1 resimden 1.

    • Remove the spring plate from behind the CPU heat sink.

    Düzenle

  67. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 66, 1 resimden 1.

    • Lift and remove the backing plate from behind the CPU heat sink.

    • The backing plate has two posts that fit into alignment holes in the logic board and heat sink.

    Düzenle

  68. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 67, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 67, 2 resimden 2.

    • Remove the three 12 mm T8 Torx screws securing the GPU heat sink to the logic board.

    • Remove the three springs left behind.

    • These springs might come up with the screws; be careful not to lose track of them.

    Düzenle

  69. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 68, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 68, 2 resimden 2.

    • Lift and remove the heat sink up off the logic board.

    • The CPU will most likely detach with the heat sink, so be careful about where you lay it down.

    Düzenle

  70. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, CPU: adım 69, 2 resimden 1. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, CPU: adım 69, 2 resimden 2.

    • The CPU will most likely be stuck to the heat sink with thermal compound.

    • Insert the flat edge of a spudger between the CPU and heat sink.

    • Gently pry the CPU off the heat sink by slightly twisting the spudger upwards.

    Düzenle

  71. iMac Intel 21.5" EMC 2544 Heat Sink Replacement: adım 70, 1 resimden 1.

    • Remove the CPU from the heat sink. Be careful not to touch the contacts.

    Düzenle

  72. iMac Intel 21.5" EMC 2544 Heat Sink Replacement, Heat Sink: adım 71, 1 resimden 1.

    • Heat sink remains.

    • To reinstall the heat sink, see our thermal paste guide for instructions on cleaning and preparing the thermal surfaces and applying a new layer of thermal compound onto the CPU and GPU dies.

    Düzenle
Sonuç

To reassemble your device, follow these instructions in reverse and use our Adhesive Strips Guide to reattach the display glass.

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