Introduction

Use this guide to replace a dead Bluetooth board.

Image 1/2: Both screws remain captive within the access door. Image 2/2: Remove the access door.
  • Loosen the two Phillips screws securing the access door to your iMac.

  • Both screws remain captive within the access door.

  • Remove the access door.

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Image 1/1: Three 6 mm T8 Torx screws
  • Remove the following screws along the lower edge of your iMac:

    • Three 6 mm T8 Torx screws

    • One 8 mm T8 Torx screw

My iMac had four 6mm T8 Torx screws (so not one 8mm screw)

floor - Reply

Image 1/2: To lift the front bezel off the iMac, simultaneously: Image 2/2: Use your thumbs to press in the RAM arms and hold the iMac down.
  • Lay your iMac stand-side down on a flat surface.

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

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

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

    • Pull the front bezel up with your index fingers.

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

My iMac did not have the "small bridge of material" mentioned, however the bezel just lifted off easily.

maccentric - Reply

Image 1/3: The third picture shows the top front bezel brackets and their slots cut into the top edge of the iMac's rear case. Image 2/3: Do not completely remove the front bezel, as it is still attached by the camera/microphone cables. Image 3/3: Do not completely remove the front bezel, as it is still attached by the camera/microphone cables.
  • Lift the front bezel off the rear case and rotate it away from the bottom edge of the iMac, minding the camera and microphone cables still attached to its upper edge.

  • The third picture shows the top front bezel brackets and their slots cut into the top edge of the iMac's rear case.

  • Do not completely remove the front bezel, as it is still attached by the camera/microphone cables.

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Image 1/1: The microphone connector is located near the inside of top edge of your iMac.
  • If necessary, remove the strip of tape covering the microphone cable connector.

  • The microphone connector is located near the inside of top edge of your iMac.

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Image 1/3: Disconnect the camera cable by pulling its connector away from the socket on the camera board. Image 2/3: The camera cable connector and socket are delicate and easily bent. Remove with caution. Image 3/3: The camera cable connector and socket are delicate and easily bent. Remove with caution.
  • Disconnect the microphone cable.

  • Disconnect the camera cable by pulling its connector away from the socket on the camera board.

  • The camera cable connector and socket are delicate and easily bent. Remove with caution.

I found it easier not to remove the cables connecting camera and microphone, but rather to lean the plastic frame agains a pile of books so that it could rest almost vertical avoiding the need to disconnect those two sensitive cables.

Stefano C - Reply

I agree that for a simple, quick battery change, don't risk damaging those delicate wires. Ignore Step 6 and instead of disconnecting the mic and camera wires, keep them in place and just have a friend hold the plastic frame up while you change the battery, or prop it up as mentioned by Stefano C above.

WT Kwok - Reply

Make sure you double check the new logic board for the presence of the GPU assembly before installing. I stupidly installed a new board without moving the GPU from the old one first. So i guess you can say this guide worked for me twice. :)

Trevor Kearsey - Reply

Image 1/1: Use the flat end of a spudger to pry the Bluetooth antenna connector off the Bluetooth board.
  • The Bluetooth Board is located on the lower left corner of the iMac, to the left of the RAM modules.

  • Use the flat end of a spudger to pry the Bluetooth antenna connector off the Bluetooth board.

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Image 1/1:
  • Remove the two T6 Torx screws securing the Bluetooth board to the logic board.

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Image 1/2: Maneuver the Bluetooth board out from under the inverter cable and remove it from the iMac. Image 2/2: Maneuver the Bluetooth board out from under the inverter cable and remove it from the iMac.
  • Use the flat end of a spudger to gently pry the right side of the Bluetooth board away from the logic board.

  • Maneuver the Bluetooth board out from under the inverter cable and remove it from the iMac.

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Conclusion

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

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