Apple iMac (24-inch, M1, 2021, Four ports) Repair User Manual

  • Post last modified:May 15, 2023
  • Post category:Apple

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Apple iMac (24-inch, M1, 2021, Four ports) Repair

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Introduction

This manual includes technical instructions for replacing genuine Apple parts in Mac and is intended for individual technicians with the knowledge, experience, and tools required to repair electronic devices.

Warranty Information

Damage caused by repairs performed outside of Apple or the Apple Authorized Service Provider network is not covered by Apple’s warranty or AppleCare plans. Such damage may cause future repairs to be subject to out-of-warranty costs or render the device ineligible for future repairs by Apple or Apple Authorized Service Providers.

Tools and Parts

Ordering Tools and Parts
You can learn how to order genuine Apple parts and tools at support.apple.com/self-service-repair. During the purchase process, enter the manual ID SNCHJB to indicate that you’ve read this manual in its entirety and agree that you have the knowledge and experience to perform your intended repair.

Software Tools

Apple Diagnostics can check your Mac for hardware issues. A System Configuration step may be required at the end of your repair. System Configuration is a post repair software tool that completes the repair for genuine Apple parts. Running System Configuration has a number of purposes that vary based on the part replaced.

What System Configuration does Why it’s important
Updates replacement logic board with device serial number Replacement logic boards must be updated with your device’s serial number to ensure that Apple Pay, FaceTime, iMessage, and iCloud services, such as

Find My, can communicate safely and securely with your device.

Transfers factory calibration values Certain parts like displays, cameras, and ambient light sensors have calibration values that are customized to each individual part during manufacturing.

Transferring these values ensures maximum performance and quality after a repair.

Links Secure Enclave and biometric authentication parts After repair of a logic board or a biometric authentication part (Touch ID), linking the biometric sensors to the Secure Enclave on the logic board is required to ensure device security.
Ensures repair integrity After a hardware repair, software checks are performed to ensure repair integrity. Repair integrity means that a genuine Apple part has been correctly installed.
Assigns wireless region To comply with regional communications regulations, a wireless region must be assigned to your logic board.
Updates firmware Keeping firmware up to date ensures that the device has all the latest security and performance features.

System Configuration requires a strong Wi-Fi network capable of 1.0 Mbps download and upload speeds, with less than 400 ms latency and less than 2% packet loss. Estimated data usage to run System Configuration is 6–22 MB. The device must be running the latest version of macOS and not a beta version. Learn how to initiate the System Configuration process at support.apple.com/self-service-repair.

Alerts
Failure to follow alerts could result in electric shock, injury, data loss, or damage to the device, parts, or other property.

Exploded View and Orderable Parts

This section shows parts, part names, and part numbers for iMac (24-inch, M1, 2021, Four ports).

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Part Name Number
1. Display 661-16565, silver

661-16567, yellow

661-16569, green

661-16571, blue

661-16573, pink

661-16575, purple

661-16577, orange

2. Display backlight flex cable 923-05587
3. Microphone flex cable 923-05155
4. Battery board cable 923-05589
5. High-speed flex cable 923-05588
6. Low-speed flex cable 923-05590
7. Audio board flex cable 923-05677
8. Camera and embedded DisplayPort flex cable 923-05586
9. Battery board 923-05182
10. Low-speed flex cable cowling 923-05563
11. Left USB-C board cowling with speaker clip 923-05564
12. Right USB-C board cowling 923-05565
13. Adapter board 923-05163
14. USB-C board 923-05575, silver

923-05576, yellow

923-05577, green

923-05578, blue

923-05579, pink

923-05580, purple

923-05581, orange

15. Wi-Fi antenna 923-05137
16. Logic board cover 923-05133
17. Logic board 661-16543, 8-core CPU, 8-core GPU, 8 GB, 256 GB

661-16545, 8-core CPU, 8-core GPU, 8 GB, 512 GB

661-16547, 8-core CPU, 8-core GPU, 8 GB, 1 TB

661-16549, 8-core CPU, 8-core GPU, 8 GB, 2 TB

661-16551, 8-core CPU, 8-core GPU, 16 GB, 256 GB

661-16553, 8-core CPU, 8-core GPU, 16 GB, 512 GB

661-16555, 8-core CPU, 8-core GPU, 16 GB, 1 TB

661-16556, 8-core CPU, 8-core GPU, 16 GB, 2 TB

18. Wi-Fi and Bluetooth antenna 923-05136
Part Name Number
19. Audio board 923-05138, silver

923-05139, yellow

923-05140, green

923-05673, blue

923-05674, pink

923-05675, purple

923-05676, orange

20–21. Fan (pair) 923-05161
22. Housing 923-05532, silver

923-05533, yellow

923-05534, green

923-05535, blue

923-05536, pink

923-05537, purple

923-05538, orange

23. Flange 923-05175, silver

923-05176, yellow

923-05177, green

923-05178, blue

923-05179, pink

923-05180, purple

923-05181, orange

24. Stand 923-05149, silver

923-05150, yellow

923-05151, green

923-05152, blue

923-05153, pink

923-05159, purple

923-05160, orange

25. VESA mount adapter 923-05188
Part Name (Not Shown) Number
143W power adapter with Ethernet 661-18536, silver

661-18537, yellow

661-18538, green

661-18539, blue

661-18540, pink

661-18541, purple

661-18542, orange

Battery board adhesive 923-05154
Low-speed flex cable to logic board connector cowling 923-05566
Power cord

Read the Important alert below to ensure that you order the correct power cord.

923-05141

Screws

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Tools

Tools with part numbers are available for purchase from the Self Service Repair Store. Tools without part numbers can be purchased from electronics supply retailers.

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Ethanol wipes must contain at least 90% ethanol and no additives except isopropyl alcohol.

The display starter kit and the display refill kit include the following tools:

  • Adhesive cutter
  • Adhesive cutter replacement wheels
  • Backlight cable connector tape
  • Display adhesive strips
  • Logic board cover tape

Broken Glass Safety

Tools
Perform the following steps to secure a display with broken glass:

  • Thoroughly cover the broken display with packing tape.
    • Cut-resistant gloves
    • Packing tape
    • Safety glasses with side shields
  • Put on safety glasses with side shields and the cut-resistant gloves.
  • If the display is broken and is still attached to the housing, secure the broken glass with packing tape and remove the display.
  • Lay the display on a smooth, clean work surface.

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Electrical Safety

Be aware of the following precautions to avoid electric shock:

  • Never remove or install any parts while the device is plugged into an electrical outlet.
  • Always wait at least 2 minutes after unplugging the device to allow the logic board or power supply or both to discharge.
  • Don’t touch the logic board or power supply before the 2-minute discharge wait time has passed.

First Steps

Always perform the following steps before starting a repair:

  • Back up the Mac.
  • If replacing the logic board, turn off Find My Mac. Choose Apple Menu > System Preferences > Apple ID. Select iCloud in the sidebar. Then deselect the Find My Mac checkbox. If you’re unable to access the Apple menu, continue performing the following steps.
  • Turn off the Mac.
  • If you were unable to turn off Find My Mac from the Apple menu, go to iCloud.com/find on a different device. Select All Devices. Select the device you want to remove. Then select Remove from Account.
  • Unplug the power cord from both the electrical outlet and the back of the device. Keep the power cord unplugged while the device is being repaired.
  • Disconnect all other cables from the device.
  • Clear and clean your workspace.
  • Put on an ESD wrist strap and attach it to a properly grounded ESD mat.

Be aware of the following while performing a repair:

  • The manual for this model may show images of other models, but the procedures are the same. Ensure that you use the correct tools for the model you’re repairing.
  • Take your time. Thoroughly read all instructions and alerts.
  • Magnetizing the screwdrivers will make it easier to work with small screws.
  • Use only Kapton tape to secure cables and keep them out of the way when removing and reinstalling parts.
  • The end of each flex cable must align with its connector. Press the end of each flex cable to its connector until it clicks to ensure that it’s secure.

Display

Before You Begin

Tools

  • Adhesive cutter
  • Adhesive cutter replacement wheel
  • Display support stand
  • Ethanol wipes or isopropyl alcohol (IPA) wipes
  • Micro terry polishing cloth
  • Nylon probe (black stick)
  • Painters tape
  • Safety glasses
  • Sticky silicone roller
  • Support wedges

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  • Place the stand wedge between the stand and housing as shown. Ensure that the wedge is centered and the power port is covered.
  • Insert the adhesive cutter at a 90-degree angle between the display and the housing. Run the adhesive cutter across the top of the computer, avoiding the 3-inch area surrounding the camera.
  • Lay the computer on a flat surface with the display faceup. Run the adhesive cutter between the display and the housing on the left and right sides.
  • Run the adhesive cutter between the display and housing on the bottom edge of the computer.
  • Run the adhesive cutter back and forth between the display and housing around all four edges of the computer until the wheel moves with minimal resistance.
  • Insert the flat end of the black stick halfway to its notch between the display and housing. Slide the black stick up and down to cut any remaining adhesive.
  • Rotate the computer so the top edge of the display is closest to you. If fully released, the display will extend slightly over the top edge of the housing.
  • Hold the display by the edges and slowly lift it straight up about 1 to 2 inches. Don’t strain the flex cables that are connected to the logic board and back of the display.
  • Insert the bottom edge of the display into the slot in the stand support wedge (1) as you slowly tilt up the top edge of the display (2).
  • Insert the two triangle support wedges into the housing as shown.
  • Peel the polyester film tape from the display backlight flex cable (1) and save it for reassembly. Pull the end of the display backlight flex cable straight down and out of the connector (2).
  • Flip up the locking levers of the camera and embedded DisplayPort (eDP) flex cable connectors (1). Slide both ends of the eDP flex cable out of their connectors (2).
  • Lift the display off the support wedges and set it on the display support stand.
  • Peel the display adhesive from the edges of the display.
  • Use an ethanol wipe or IPA wipe to remove any remaining display adhesive from the edges of the display. Allow the surfaces to dry for at least 1 minute.
  • Use Kapton tape to secure the camera and eDP flex cable and display backlight flex cable to the housing.
  • Peel the display adhesive from the edges of the housing.
  • Use an ethanol wipe or IPA wipe to remove any remaining display adhesive from the edges of the housing. Allow the surfaces to dry for at least 1 minute.

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Reassembly

  • Place the display adhesive strips on a flat surface and check them for damage and wrinkles.
    • 946-25206 (1)
    • 946-25207 (2)
    • 946-25208 (3)
    • 946-18118 (4)
  • Lay the housing flat as shown. Peel off a short section of the paper release liner from one display adhesive strip.
  • Align the display adhesive strip with the corresponding edge of the housing and press the exposed adhesive onto the housing.
  • As you continue to align the display adhesive strip, peel off sections of the paper release liner and press the adhesive to the edge of the housing until the entire strip adheres.
  • Repeat steps 2 through 4 to install the remaining display adhesive strips.
  • Inspect the alignment of the display adhesive strips. Ensure that there are no wrinkles or air pockets.
  • Rotate the housing so the top edge is closest to you. Position the support wedges in the housing as shown.
  • Insert the bottom edge of the display into the slot in the stand support wedge. Rest the display on the triangle support wedges.
  • Peel the Kapton tape from the camera and eDP flex cable and display backlight flex cable.
  • Slide the two ends of the camera and eDP flex cable into the connectors (1) on the back of the display. Then flip down the locking levers (2).
  • Slide the end of the display backlight flex cable into the connector on the back of the display (1).
  • Adhere the tape onto the display backlight flex cable connector (2).
  • Slightly lift the top edge of the display. Remove the two triangle support wedges from the housing.
  • Slowly pull the display out of the slot in the stand support wedge (1). Then lower the top edge of the display toward the housing (2).
  • Position the display flat on the housing. The top edge of the display should hang just over the top edge of the housing.
  • Apply two strips of painters tape to the bottom of the computer to temporarily secure the display to the housing.
  • Hold the display flush against the housing as you carefully stand up the computer. The display will shift slightly as it hooks onto the display hangers and aligns with the edges of the housing.
  • Separate the display just enough to remove the release liners from the four display adhesive strips on the top half of the computer.
  • Ensure that the display and housing are aligned on all four sides. Then carefully adjust the two strips of painters tape so they fit snugly over the bottom of the computer.
  • Press the top of the display to adhere it to the display adhesive strips on the housing.
  • Apply two strips of painters tape to the top of the computer to temporarily secure the display to the housing.
  • Remove the two strips of painters tape from the bottom of the computer.
  • Separate the display from the housing just enough to remove the release liners from the four display adhesive strips on the bottom half of the computer. Start near the middle and peel the release liners toward the bottom corners of the computer in the order shown. If the display separates too much from the housing, the display will unhook from the display hangers and may fall off the housing.
  • Press the bottom of the display to adhere it to the display adhesive strips on the housing.
  • Ensure that the four edges of the display and housing are aligned. If they aren’t aligned, repeat the removal and reassembly steps.
  • Remove the two strips of painters tape from the top of the computer.
  • Remove the liner from the sticky sheet pad. Roll the silicone roller back and forth on the sticky sheet pad to clean it.
  • Roll the sticky silicone roller back and forth along all four edges of the display to adhere the display adhesive strips.
  • Clean the display with the micro terry polishing cloth.
  • Remove the stand wedge.

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Battery Board and Batteries

Before You Begin

Tools

  • ESD-safe tweezers
  • Ethanol wipes or isopropyl alcohol (IPA) wipes
  • Nylon probe (black stick)
  • Support wedges

Remove the following part before you begin:

  • Display

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Removal

  • Position the housing with the back facedown and the top closest to you.
  • Position the pointed end of the black stick underneath the battery cable and close to the connector. Hold the battery cable in place against the black stick and lift the end of the battery cable off the connector.
  • Use ESD-safe tweezers to grasp the battery adhesive tab and gently peel it from the battery board.
  • Use ESD-safe tweezers to grasp the battery adhesive tab. Keep the tweezers close and parallel to the housing. Then slowly twist the tweezers to wrap the adhesive around them.
  • Pull the tweezers outward as shown. As the battery adhesive strip stretches, continue to slowly pull and twist the tweezers until you have removed the entire strip.
  • Use the black stick to gently push the batteries outward to remove the batteries from the battery board.
  • Remove the battery board from the housing and place it on an ESD-safe surface.
  • Turn over the battery board. Peel off any remaining adhesive. Use an ethanol wipe or IPA wipe to clean any adhesive residue from the back of the battery board.

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Reassembly

  • If you removed the batteries or are installing new batteries, slide the batteries positive (+) side up into the battery compartments on the battery board.
  • If you reinstall the same battery board, apply a new adhesive strip to the back of the battery board as shown. Fold down the adhesive tab between the batteries (1).
  • Peel the large blue release liner from the back of the battery board to expose the battery board adhesive.
  • Align the top edge of the battery board with the cutout in the housing. Then lay down the battery board.
  • Press and hold the battery board for 15 seconds in the areas shown in blue to adhere it to the housing.
  • Press the end of the battery cable to the connector.
  • Reinstall the following part to complete reassembly:
    • Display

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Logic Board Cover

Before You Begin

Tools

  • Support wedges
  • Torx T3 screwdriver

Remove the following part before you begin:

  • Display

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Removal

  • Position the housing with the back facedown and the top closest to you.
  • Peel the tape off the middle of the logic board cover. Save the tape for reassembly.
  • Use the T3 screwdriver to remove the 11 T3 screws (923-05557) from the logic board cover.
  • Tilt up the logic board cover. Then pull it toward you to remove it from the housing.

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Reassembly

  • Look for foam on the underside of the logic board cover where the speaker cables connect to the logic board.
  • If the logic board cover has foam, don’t adhere foam over the speaker cable connectors on the logic board.
  • If the logic board cover doesn’t have foam, adhere foam over the speaker cable connectors on the logic board.
  • Slide the logic board cover into the housing. Then reposition it over the logic board.
  • Use the T3 screwdriver to reinstall the 11 T3 screws (923-05557) into the logic board cover.
  • Adhere the tape onto the middle of the logic board cover.

Reinstall the following part to complete reassembly:

  • Display

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Stand

Before You Begin

Tools

  • Adjustable torque driver (1.2-3 Nm)
  • Support wedges
  • Torx Plus 10IP bit

Remove the following part before you begin:

  • Display

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Removal

  • Remove the stand support slot wedge from the stand.
  • Insert the Torx Plus 10IP bit into the 1.2-3 Nm adjustable torque driver.
  • Lay the triangle support wedges used for display removal on their sides. Then place the housing on top of them as shown with the back of the housing facing down and the stand positioned between the triangle support wedges.
  • Use the adjustable torque driver and Torx Plus 10IP bit to remove the seven 10IP screws in the order shown.
  • Remove the flange and stand from under the housing.

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Reassembly

  • Position the stand upright.
  • Firmly press the two alignment pins into the outer screw holes of the stand.
  • Install the flange over the alignment pins.
  • Lift the housing. Then position the housing so the alignment pins line up with the outer screw holes of the housing.
  • Move the housing so the alignment pins insert into the two outer screw holes of the housing.
  • Insert the Torx Plus 10IP bit into the 1.2-3 Nm adjustable torque driver. Set the torque value to 1.4 Nm.
  • Use the adjustable torque driver and Torx Plus 10IP bit to partially reinstall five 10IP screws in the order shown. Note: One of the screws (4) is shorter than the other screws.
    • (923-05554) (1–3, 5)
    • (923-06114) (4)
  • Remove the alignment pins by rotating them counterclockwise and pulling them out of the housing.
  • Lay the triangle support wedges on their sides. Then place the housing on top of them as shown with the back of the housing facing down and the stand positioned between the triangle support wedges.
  • Use the adjustable torque driver and Torx Plus 10IP bit to partially reinstall the remaining two 10IP screws in the outer screw holes.
  • Use the adjustable torque driver and Torx Plus 10IP bit to fully reinstall the seven 10IP screws in the order shown.
  • Place the computer upright. Hold the top and bottom edges of the housing. Then gently push the housing back and forth to ensure that it tilts back and forth smoothly.
  • Reinstall the following part to complete reassembly:
    • Display

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USB-C Boards

Before You Begin

Tools

  • Nylon probe (black stick)
  • Support wedges
  • Torx T3 screwdriver

Remove the following part before you begin:

  • Display

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Removal

  • Peel off the polyester film tape from the USB-C boards. Save it for reassembly.
  • Use the T3 screwdriver to remove the two T3 screws (923-05555) from each USB-C board.
  • Flip up the USB-C boards to access the USB-C board cowlings.
  • Use the T3 screwdriver to remove the two T3 screws (923-05562) from each cowling.
  • Remove the right cowling and save it for reassembly.
  • Gently move the left cowling and speaker cable out of the way to access the left USB-C board connector.
  • Use the flat end of the black stick to lift the ends of the USB-C board flex cables off the connectors on the adapter board.
  • Remove the USB-C boards from the housing.

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Reassembly

  • Position the USB-C boards over the connectors. Then press the ends of the USB-C board flex cables to the connectors on the adapter board.
  • Use the T3 screwdriver to reinstall the two T3 screws (923-05562) into each cowling.
  • Position the USB-C board cowlings over the connectors.
  • Flip down the USB-C boards. Ensure that they are aligned with the screw holes.
  • Reinstall the polyester film tape over the USB-C boards.
  • Use the T3 screwdriver to reinstall the two T3 screws (923-05555) into each USB-C board as shown.
  • Reinstall the following part to complete reassembly:
    • Display

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VESA Mount Adapter

Before You Begin

Tools

  • Adjustable torque driver (1.2-3 Nm)
  • Support wedges
  • Torx Plus 10IP bit

Remove the following part before you begin:

  • Display

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Removal

  • Use the adjustable torque driver and Torx Plus 10IP bit to remove the seven 10IP screws (923 05554) in the order shown.
  • Lay the computer flat in the VESA support slot wedge with the back of the housing facing down and the logic board closest to you.
  • Insert the Torx Plus 10IP bit into the 1.2-3 Nm adjustable torque driver.
  • Lift the computer off the support stand.

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Reassembly

  • Firmly press the two alignment pins into the outer screw holes in the middle of the VESA mount adapter.
  • Install the flange over the alignment pins and onto the VESA mount adapter.
  • Slide the housing onto the alignment pins. Ensure that the alignment pins enter the outer screw holes of the housing.
  • Insert the Torx Plus 10IP bit into the 1.2-3 Nm adjustable torque driver. Set the torque value to 1.4 Nm.
  • Lift the housing. Then align the housing so the screw holes line up with the alignment pins.
  • Use the adjustable torque driver and Torx Plus 10IP bit to partially reinstall the seven 10IP screws (923-05554) in the order shown.
  • Use the adjustable torque driver and Torx Plus 10IP bit to fully reinstall the seven 10IP screws.
  • Reinstall the following part to complete reassembly:
    • Display

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Adapter Board

Before You Begin

Tools

  • Nylon probe (black stick)
  • Support wedges
  • Torx T3 screwdriver

Remove the following parts before you begin:

  • Display
  • USB-C boards

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Removal

  • Position the housing withvthe back facedown and thevtop closest to you.
  • Use the T3 screwdriver to remove the five T3 screws (923-05559) from the low-speed flex cable cowling.
  • Remove the low-speed flex cable cowling and save it for reassembly.
  • Pull the tab to flip up the locking bar on the high-speed flex cable (1).
  • Use the flat end of the black stick to lift both ends of the low-speed flex cable off the connectors.
  • Slide the end of the high-speed flex cable out of the connector (2).
  • Use the T3 screwdriver to remove the five T3 screws (923-05560) from the adapter board.
  • Place the flat end of the black stick between the adapter board and housing. Then use the flat end of the black stick to lift the adapter board out of the housing.

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Reassembly

  • Position the adapter board in the housing.
  • Once all five T3 screws are partially installed, use the T3 screwdriver to fully reinstall them into the adapter board.
  • Use the T3 screwdriver to partially reinstall the five T3 screws (923-05560) into the adapter board.
  • Flip down the locking bar on the high-speed flex cable (2).
  • Gently press both ends of the low-speed flex cable to the connectors on the adapter board.
  • Slide the end of the high-speed flex cable into the connector (1).
  • Use the T3 screwdriver to reinstall the five T3 screws (923-05559) into the low-speed flex cable cowling.
  • Position the low-speed flex cable cowling in the housing.
  • Reinstall the following parts to complete reassembly:
    • USB-C boards
    • Display

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Audio Board

Before You Begin

Tools

  • 3.5 mm hex nut driver
  • Ear Pods with 3.5 mm headphone plug
  • ESD-safe tweezers
  • Nylon probe (black stick)
  • Support wedges
  • Torx T3 screwdriver

Remove the following parts before you begin:

  • Display
  • Logic board cover

Removal

  • Use the flat end of the black stick to press and hold the “PUSH” button on the audio board ZIF connector (2). Use ESD-safe tweezers to grasp the end of the flex cable and slide it out of the connector (3).
  • Partially peel up the audio board flex cable (1) to access the connector near the edge of the housing.
  • Use the T3 screwdriver to remove the upper three T3 screws (923-05574) and the lower T3 screw (923-05668) from the Wi-Fi and Bluetooth antenna.
  • Flip up the locking lever of the power button flex cable connector. Then use ESD-safe tweezers to slide the end of the power button flex cable out of the connector on the audio board.
  • Use the T3 screwdriver to remove the upper T3 screw (923-05670) and the lower T3 screw (923 05669) from the audio board.
  • Gently move aside the Wi-Fi and Bluetooth antenna to access the power button flex cable underneath.
  • Use the 3.5 mm hex nut driver to remove the 3.5 mm hex nut screw (923-05671) from the audio board.
  • Insert the flat end of the black stick under the audio board to loosen the adhesive in the areas shown (1,2). Then use ESD-safe tweezers to gently peel up the audio board and remove it from the housing.

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Removal

  • Align the screw holes in the audio board with the screw holes in the housing.
  • Use the T3 screwdriver to partially install the upper T3 screw (923-05670) and the lower T3 screw (923-05669) into the audio board.
  • Use the 3.5 mm hex nut driver to partially reinstall the 3.5 mm hex nut screw (923-05671).
  • Plug the Ear Pods into the 3.5 mm headphone jack to ensure audio board alignment. Adjust the alignment of the audio board until the plug is easy to insert and remove.
  • Use the T3 screwdriver nut to fully tighten the two T3 screws. Then use the 3.5 mm hex nut driver to fully reinstall the 3.5 mm hex nut screw.
  • Unplug the Ear Pods.
  • Read here the top portion of the audio board to the housing.
  • Slide the end of the audio board flex cable into the ZIF connector.
  • Slide the end of the power button cable into the audio board. Then flip down the locking lever.
  • Use the T3 screwdriver to reinstall the upper three T3 screws (923-05574) and the lower T3 screw (923-05668) into the Wi-Fi and Bluetooth antenna.
  • Position the Wi-Fi and Bluetooth antenna in the housing.
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display

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Audio Board Flex Cable

Before You Begin

Tools

  • ESD-safe tweezers
  • Nylon probe (black stick)
  • Support wedges

Remove the following parts before you begin:

  • Display
  • Logic board cover

Apple-iMac-24-inch-M1-4-Ports-79

Removal

  • Use the flat end of the black stick to press and hold the “PUSH” button on the audio board flex cable ZIF connector on the logic board. Then slide the end of the audio board flex cable out of the connector.
  • Use the flat end of the black stick to press and hold the “PUSH” button on the audio board ZIF connector (2) on the housing. Use ESD-safe tweezers to grasp the end of the flex cable and slide it out of the connector (3).
  • Peel up the audio board flex cable from the housing (1) to access the ZIF connector near the edge of the housing.

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Reassembly

  • Position the replacement audio board flex cable in the housing.
  • Use the flat end of the black stick to press the “PUSH” button on the audio board flex cable ZIF connector on the logic board. Then slide the end of the flex cable into the connector.
  • Use the flat end of the black stick to press and hold the “PUSH” button on the audio board flex cable ZIF connector on the housing. Then use ESD-safe tweezers to slide the end of the flex cable into the connector.
  • Remove the adhesive backing from the audio board flex cable. Then press along the length of the audio board flex cable to adhere it to the housing.
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display

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Battery Board Cable

Before You Begin

Tools

  • Nylon probe (black stick)
  • Support wedges

Remove the following parts before you begin:

  • Display
  • Logic board cover

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Removal

  • Position the housing with the back facedown and the top closest to you.
  • Gently peel up the polyester film tape attached to the housing in the area shown. Don’t remove the tape from the battery board cable. Remove the cable from the housing.
  • Use the black stick to lift the end of the battery board cable off the connector on the logic board. Then lift the other end of the battery board cable off the connector on the battery board.

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Apple-iMac-24-inch-M1-4-Ports-84

Reassembly

  • Adhere the polyester film tape to the battery board cable and housing as shown.
  • Position the battery board cable in the housing as shown. Press one end of the battery board cable to the connector on the logic board (1). Then press the other end of the cable to the battery board (2).
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display

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Camera and Embedded DisplayPort Flex Cable

Before You Begin

Tools

  • Nylon probe (black stick)
  • Support wedges

Remove the following parts before you begin:

  • Display
  • Logic board cover

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Removal

  • Position the housing with the back facedown and the top closest to you.
  • Pull the tab to flip up the locking bar on the camera and embedded DisplayPort (eDP) flex cable (1).
  • Slide the end of the camera and eDP flex cable straight out of the connector to remove it from the housing (2).

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Reassembly

  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display
  • Slide the end of the camera and eDP flex cable into the connector (1). Then flip down the locking bar (2).

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Display Backlight Flex Cable

Before You Begin

DisplayPort flex cable Remove the following parts before you begin:

  • Display
  • Logic board cover
  • Camera and embedded

Tools

  • Nylon probe (black stick)
  • Support wedges

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Removal

  • Position the housing with the back facedown and the top closest to you.
  • Peel off the polyester film tape from the end of the display backlight flex cable. Save the polyester film tape for reassembly.
  • Squeeze both sides of the end of the display backlight flex cable and pull it straight out of the connector.

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Apple-iMac-24-inch-M1-4-Ports-92

Reassembly

  • Slide the end of the display backlight flex cable into the connector.
  • Reinstall the polyester film tape onto the display backlight flex cable connector.
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display

Fans

Before You Begin

Tools

  • 2.5 mm hex nut driver
  • Nylon probe (black stick)
  • Support wedges
  • Torx T3 screwdriver

Remove the following parts before you begin:

  • Display
  • Logic board cover

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Removal

  • Use the T3 screwdriver to remove the two T3 screws (923-05558) (1) from each of the fans.
  • Use the 2.5 mm hex nut driver to remove the two 2.5 mm hex nut screws (923-05573) (2) from the logic board.
  • Position the housing with the back facedown and the top closest to you.
  • Use ESD-safe tweezers to peel back the polyester film tab from the fan cable connector.
  • Use the black stick to flip up the locking lever on the fan cable connector.
  • Spread the tips of the ESD-safe tweezers and insert one tip under the fan cable. Then gently slide the tip of the ESD-safe tweezers toward the fan under the fan cable to loosen the adhesive between the fan cable and logic board.
  • Use the black stick to support the fan cable. Then gently slide the end of the fan cable out of the connector.
  • Repeat steps 1 through 7 on the other side of the logic board to remove the other fan cable.
  • Place the computer upright.
  • Use the 2.5 mm hex nut driver to remove the seven 2.5 mm hex nut screws from the logic board.
    • (923-05573) (1–3)
    • (923-05556) (4–7)
  • Tilt up the logic board (1). Then slide the right fan out from under the logic board (2).
  • With the logic board still tilted up (1), slide the left fan out from under the logic board (2).

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Reassembly

  • Tilt up the logic board (1). Then slide the right fan into place under the logic board (2).
  • With the logic board still tilted up, slide the left fan into place under the logic board.
  • Position the housing with the back facedown and the top closest to you.
  • Slide the end of the fan cable into the fan cable connector. Then flip down the locking lever.
  • Press the polyester film tab to the fan cable connector.
  • Rotate the computer so the logic board is closest to you.
  • Press the fan cable to adhere it to the logic board.
  • Repeat steps 4 through 6 to reinstall the other fan.
  • Use the T3 screwdriver to reinstall the two T3 screws (923-05558) into each of the fans.
  • Use the 2.5 mm hex nut driver to reinstall the nine 2.5 mm hex nut screws into the logic board.
    • (923-05573) (1–5)
    • (923-05556) (6–9)
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display

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High-Speed Flex Cable

Before You Begin

Tools

  • Nylon probe (black stick)
  • Support wedges

Remove the following parts before you begin:

  • Display
  • Logic board cover
  • Camera and Embedded
  • DisplayPort Flex Cable

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Removal

  • Position the housing with the back facedown and the top closest to you.
  • Pull the tab to flip up the locking bar on the high-speed flex cable (1).
  • Slide the end of the high-speed flex cable out of the connector on the adapter board (2).
  • Pull the tab to flip up the locking bar on the high-speed flex cable (1).
  • Insert the flat end of the black stick under the high-speed flex cable to loosen the adhesive between the flex cable and housing (2).
  • Slide the end of the high-speed flex cable out of the connector on the logic board (3).

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Reassembly

  • Insert the logic board end of the high-speed flex cable into the connector on the logic board (1).
  • Flip down the locking bar on the high-speed flex cable (2).
  • Insert the adapter board end of the high-speed flex cable into the connector on the adapter board (1).
  • Flip down the locking bar on the high speed flex cable (2). Then press the folded corner of the flex cable to adhere it to the housing (3).
  • Reinstall the following parts to complete reassembly:
    • Camera and embedded DisplayPort flex cable
    • Logic board cover
    • Display

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Logic Board

Before You Begin

Tools

  • 2.5 mm hex nut driver
  • Antenna tool
  • Nylon probe (black stick)
  • Support wedges
  • Torx T3 screwdriver

Remove the following parts before you begin:

  • Display
  • Logic board cover

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Removal

  • Use the T3 screwdriver to remove the five T3 screws (923-05559) from the low-speed flex cable cowling on the adapter board.
  • Remove the low-speed flex cable cowling and save it for reassembly.
  • Use the flat end of the black stick to lift both ends of the low-speed flex cable off the connectors on the adapter board.
  • Peel off the foam pad from the speaker cable connector. Save the foam pad for reassembly.
  • Use the flat end of the black stick to lift the end of the speaker cable off the connector.
  • Peel off the polyester film tape from the display backlight cable connector. Save it for reassembly.
  • Pinch the sides of the end of the display backlight flex cable and slide it out of the connector.
  • Use the flat end of the black stick to press and hold the “PUSH” button on the zero-insertion force (ZIF) microphone flex cable connector. Then, slide the end of the microphone flex cable out of the connector.
  • Use the flat end of the black stick to press and hold the “PUSH” button on the ZIF audio board and power button cable connector. Then slide the end of the audio board and power button cable out of the connector.
  • Use the black stick to support the battery board cable. Then gently lift the end of the battery board cable off the connector.
  • Use the T3 screwdriver to remove the five T3 screws from the antenna grounding clips.
    • (923-05174) (1)
    • (923-05173) (2)
  • Pull the tab to flip up the locking bar on the high-speed flex cable.
  • Slide the end of the high-speed flex cable out of the connector.
  • Pull the tab to flip up the locking bar on the camera and eDP flex cable.
  • Slide the end of the camera and eDP flex cable out of the connector.
  • Use the 2.5 mm hex nut driver to remove the two 2.5 mm hex nut screws (923-05573) near each of the fan cables.
  • Position the housing with the back facedown and the top closest to you.
  • Use the antenna tool to lift the ends of the three antenna coaxial cables off the connectors.
  • Use ESD-safe tweezers to peel back the polyester film tab on the fan cable connector.
  • Use the flat end of the black stick to flip up the locking lever on the fan cable connector.
  • Spread the tips of the ESD-safe tweezers and insert one tip under the fan cable. Carefully slide the ESD-safe tweezers toward the fan to loosen the adhesive between the fan cable and logic board.
  • Gently slide the end of the fan cable out of the connector.
  • Repeat steps 19 through 22 to remove the other fan cable.
  • Rotate the housing and position it with the logic board closest to you.
  • Use the 2.5 mm hex nut driver to remove the seven 2.5 mm hex nut screws from the logic board.
    • 923-05573 (1–3)
    • 923-05556 (4–7)
  • Move the flex cables out of the way as you tilt up the logic board. Then lift the logic board and low speed flex cable out of the housing.

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Reassembly

  • Move cables out of the way. Then position the logic board and low-speed flex cable in the housing.
  • Use the blunt end of the antenna tool to press the ends of the three antenna coaxial cables to the connectors.
  • Use the 2.5 mm hex nut driver to reinstall the nine 2.5 mm hex nut screws into the logic board.
    • 923-05573 (1–5)
    • 923-05556 (6–9)
  • Route the shorter antenna coaxial cable (2) under the longer antenna coaxial cable (3). Use the blunt end of the antenna tool to press the ends of the three antenna coaxial cables to the connectors.
  • Slide the end of the microphone flex cable into the connector.
  • Press the end of the speaker cable to the connector. Then reinstall the foam pad over the connector.
  • Slide the end of the display backlight cable into the connector. Then press the polyester film tape back to the display backlight cable connector.
  • Use the T3 screwdriver to reinstall the five T3 screws into the antenna grounding clips.
    • (923-05174) (1)
    • (923-05173) (2)
  • Slide the end of the audio board flex cable into the connector.
  • Press the end of the battery board cable to the connector.
  • Slide the end of the high-speed flex cable into the connector. Then flip down the locking bar on the high-speed flex cable.
  • Slide the end of the camera and eDP flex cable into the connector. Then flip down the locking bar on the camera and eDP flex cable.
  • Press the polyester film tab to the left fan cable connector.
  • Slide the end of the left fan cable into the connector. Then flip down the locking lever on the left fan cable connector.
  • Press the polyester film tab to the right fan cable connector.
  • Slide the end of the right fan cable into the connector.
  • Press the ends of the low-speed flex cable to the connectors on the adapter board.
  • Use the T3 screwdriver to reinstall the five T3 screws (923-05559) into the low-speed flex cable cowling.
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display
  • Position the low-speed flex cable cowling over the connectors.

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Low-Speed Flex Cable

Before You Begin

Tools

  • Nylon probe (black stick)
  • Support wedges
  • Torx T3 screwdriver

Remove the following parts before you begin:

  • Display
  • Logic board cover
  • Logic board

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Removal

  • Ensure that the logic board is positioned in the logic board service part packaging tray as shown.
  • Use the T3 screwdriver to remove the three T3 screws (923-05561) from the low-speed flex cable to logic board connector cowling.
  • Remove the low-speed flex cable to logic board connector cowling. Save it for reassembly.
  • Use the flat end of the black stick to lift both ends of the low-speed flex cable off the connectors on the logic board.

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Apple-iMac-24-inch-M1-4-Ports-114

Reassembly

  • Gently press the ends of the low-speed flex cable to the connectors on the logic board.
  • Reinstall the low-speed flex cable cowling.
  • Use the T3 screwdriver to reinstall the three T3 screws (923-05561) into the low-speed flex cable cowling.
  • Reinstall the following parts to complete reassembly:
    • Logic board
    • Logic board cover
    • Display

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Wi-Fi Antenna

Before You Begin

Tools

  • Antenna tool
  • Nylon probe (black stick)
  • Support wedges
  • Torx T3 screwdriver

Remove the following parts before you begin:

  • Display
  • Logic board cover

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Removal

  • Use the T3 screwdriver to remove the three T3 screws (923-05574) from the Wi-Fi antenna.
  • Use the T3 screwdriver to remove the three T3 screws from the antenna grounding clips on the logic board.
  • Use the antenna tool to lift the end of the Wi-Fi antenna cable from the connector on the logic board.
  • Use the black stick to peel the antenna cable tape from the housing.
  • Carefully lift the cable out of the channel in the speaker.
  • Remove the Wi-Fi antenna from the housing.

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Apple-iMac-24-inch-M1-4-Ports-118

Reassembly

  • Route the antenna cable around the adapter board.
  • Route the Wi-Fi antenna cable as shown. Then press along the length of the antenna cable tape to adhere it to the housing.
  • Use the flat end of the antenna tool to press the end of the Wi-Fi antenna cable to the connector on the logic board.
  • Use the T3 screwdriver to reinstall the three T3 screws into the antenna grounding clips on the logic board.
  • Use the T3 screwdriver to reinstall the three T3 screws into the Wi-Fi antenna.
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display
  • Use the T3 screwdriver to reinstall the three T3 screws into the antenna grounding clips on the logic board.
  • Use the T3 screwdriver to reinstall the three T3 screws into the Wi-Fi antenna.
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display

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Apple-iMac-24-inch-M1-4-Ports-120

Wi-Fi and Bluetooth Antenna

Before You Begin

Tools

  • Antenna tool
  • Nylon probe (black stick)
  • Support wedges
  • Torx T3 screwdriver

Remove the following parts before you begin:

  • Display
  • Logic board cover

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Removal

  • Use the T3 screwdriver to remove the four T3 screws from the Wi-Fi and Bluetooth antenna.
  • Use the T3 screwdriver to remove the T3 screw (923-05174) from the antenna grounding clip on the logic board.
  • Use the antenna tool to lift the end of the Wi-Fi and Bluetooth antenna from the logic board.
  • Use the black stick to peel the Wi-Fi and Bluetooth antenna cable tape from the speaker and housing.
  • Carefully lift the cable out of the channel in the speaker.

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Reassembly

  • Position the Wi-Fi and Bluetooth antenna in the bottom left of the housing as shown.
  • Use the flat end of the antenna tool to press the end of the Wi-Fi and Bluetooth antenna to the logic board.
  • Use the T3 screwdriver to reinstall the T3 screw (923-05174) into the antenna grounding clip.
  • Route the Wi-Fi and Bluetooth antenna cable through the channel in the speaker.
  • Press the antenna cable tape back onto the speaker and housing.
  • Use the T3 screwdriver to reinstall the four T3 screws into the Wi-Fi and Bluetooth antenna.
  • Reinstall the following parts to complete reassembly:
    • Logic board cover
    • Display

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Apple-iMac-24-inch-M1-4-Ports-125

Housing

Before You Begin

Remove the following parts before you begin:

  • Display
  • Logic board cover
  • Battery board and Batteries
  • Battery board cable
  • Camera and embedded DisplayPort flex cable
  • Display backlight cable
  • Adapter board
  • USB-C boards
  • High-speed flex cable
  • Logic board
  • Fans
  • Stand or VESA mount adapter

Tools

  • No tools are required.

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Removal
There are no additional removal steps. The housing includes the following removable parts:

  • Audio board
  • Audio board and power button cable
  • Microphone flex cable
  • Wi-Fi and Bluetooth antenna
  • Wi-Fi antenna

The housing also includes the following nonremovable parts:

  • Center Wi-Fi antenna
  • Display hangers
  • Microphone
  • Power button and power button flex cable
  • Speakers
  • Speaker back volumes

Reassembly

Reinstall the following parts to complete reassembly:

  • Stand or VESA mount adapter
  • Fans
  • Logic board
  • High-speed flex cable
  • Adapter board
  • USB-C boards
  • Display backlight cable
  • Camera and embedded DisplayPort flex cable
  • Battery board cable
  • Battery board and Batteries
  • Logic board cover
  • Display

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