iMac Intel 21.5" Retina 4K Display 2019 Display Replacement

Giriş

Follow the steps in this guide to replace the front panel in a 21.5" Retina 4K 2019 iMac.

Some images in this guide use an older iMac, which has minor visual differences. These differences do not affect the repair procedure.

This procedure involves removing the faulty/broken display, as well as transferring the display data cable and thermal sensor to a new display.

Neye ihtiyacın var

Adım 1 Install the iMac service wedge

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Install the iMac service wedge: 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. Place an iMac service wedge, in the stand to stabilize the iMac.
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.

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Adım 2 Insert the opening tool

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Insert the opening tool: adım 2, 2 resimden 1.

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Insert the opening tool: adım 2, 2 resimden 2.

Starting on the left side 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.

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Adım 3 Slice through the display adhesive

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Slice through the display adhesive: adım 3, 3 resimden 1.

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Slice through the display adhesive: adım 3, 3 resimden 2.

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Slice through the display adhesive: adım 3, 3 resimden 3.

Use the tool like a pizza cutter—roll it along the gap, cutting the foam adhesive in between the frame and display.
Be sure to always push with the cutting wheel forward. If you pull, the wheel might get pulled out of the handle.
Run the tool up along the left side of the display.

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Adım 4

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement: adım 4, 3 resimden 3.

Continue running the tool up around the top left corner.

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Adım 5

Cut the adhesive along the top left of the display.

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Adım 6

Continue along the top of the display.
You may want to run the tool back and forth a few times to ensure you completely cut through the adhesive.

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Adım 7

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement: adım 7, 3 resimden 3.

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

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Adım 8

Push the tool down along the right side of the display.

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Adım 9

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.

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Adım 10

iMac Intel 21.5" Retina 4K Display 2019 Display 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.

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Adım 11

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".

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Adım 12

iMac Intel 21.5" Retina 4K Display 2019 Display 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.

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Adım 13

Wedge the plastic card into the top right corner once again, and leave it there to prevent the adhesive from resticking.

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Adım 14

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement: adım 14, 3 resimden 3.

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

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Adım 15

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.

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Adım 16

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement: adım 16, 3 resimden 3.

Slide the plastic card toward the center.
Stop sliding just before the iSight camera to avoid damaging the camera.

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Adım 17

Wedge the plastic card back into the top left corner.

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Adım 18

iMac Intel 21.5" Retina 4K Display 2019 Display 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.

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Adım 19 Display Assembly Cables

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Display Assembly Cables: adım 19, 2 resimden 1.

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Display Assembly Cables: adım 19, 2 resimden 2.

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").
Hold the display with one hand while using your other hand to unplug the display power cable.

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Adım 20

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement: adım 20, 3 resimden 3.

Continuing to support the display with one hand, 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, keeping it parallel to the motherboard, to avoid damaging it.

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Adım 21 Separate the display

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Separate the display: adım 21, 2 resimden 1.

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Separate the display: 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

Adım 22

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement: adım 22, 3 resimden 3.

Bu adımda kullanılan alet:

Plastic Cards

$2.99

Satın Al

If necessary, a plastic card can be used to cut any remaining sections of the bottom adhesive strip.

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Adım 23

iMac Intel 21.5" Retina 4K Display 2019 Display 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.
After the adhesive is cut, it cannot be used to re-seal the display in place. Follow this guide to replace the adhesive strips that secure the display to the rear enclosure.

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Adım 24 Display

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Display: adım 24, 2 resimden 1.

iMac Intel 21.5" Retina 4K Display 2019 Display Replacement, Display: adım 24, 2 resimden 2.

Gently set the display face-down on a sturdy, flat surface. It may be helpful to put it on a towel or cloth to protect it from dirt or debris that can scratch the front glass.
Use your fingernail or the pointed tip of a spudger to flip up the retaining flap on the display data connector.

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Adım 25

Pull the display data cable connector straight out of its socket on the back of the display.

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Adım 26

Use an iOpener near the top edge of the display assembly to heat and soften the adhesive on the piece of tape holding the thermal sensor in place.
Instructions on how to properly heat and use the iOpener can be found here.

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Adım 27

Peel up the piece of tape securing the thermal sensor to the back of the display assembly.
Depending on your iMac model, the thermal sensor may be positioned slightly differently.

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Adım 28

Use an opening pick to break up the adhesive holding the thermal sensor to the back of the iMac display.

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Adım 29

Disconnect the thermal sensor from its socket on the back of the display.
Remove the thermal sensor and transfer it to your new display assembly.

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Sonuç

Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before installing.

To reassemble your device, follow the above steps in reverse order.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Check out our Answers community for troubleshooting help.

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