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iMac Intel 20" EMC 2133 and 2210 Logic Board Replacement

  • Author: Walter Galan
  • Time estimate: 1 - 2 hours
  • Difficulty: Difficult

Like brain surgery? Use this guide to replace your logic board.

Step 1 Logic Board  ¶ 

Disconnect the power button and CPU fan by lifting their connectors straight up off the logic board.

Step 1 Logic Board  ¶ 

  • Disconnect the power button and CPU fan by lifting their connectors straight up off the logic board.

Step 2  ¶ 

Disconnect the SATA data cable from the logic board by carefully pulling it straight away from its socket.

Step 2  ¶ 

  • Disconnect the SATA data cable from the logic board by carefully pulling it straight away from its socket.

  • The SATA connector on most iMacs tends to stick in its socket on the logic board. If you are having trouble disconnecting the SATA cable, insert a metal spudger or any other thin tool into the gap between the SATA connector and its socket and twist the spudger's shaft to safely separate the two pieces.

Step 3  ¶ 

Pull the SATA data cable out of its channel in the logic board and tuck it aside near the left edge of the rear case.

Step 3  ¶ 

  • Pull the SATA data cable out of its channel in the logic board and tuck it aside near the left edge of the rear case.

Step 4  ¶ 

Disconnect the DC-in cable by simultaneously depressing both locking arms and pulling its connector away from the socket on the logic board. After both locking arms pass their retaining tabs, it is helpful to push them toward the left edge of your iMac with one hand while pulling on the body of the connector with your other hand.

Step 4  ¶ 

  • Disconnect the DC-in cable by simultaneously depressing both locking arms and pulling its connector away from the socket on the logic board.

  • After both locking arms pass their retaining tabs, it is helpful to push them toward the left edge of your iMac with one hand while pulling on the body of the connector with your other hand.

Step 5  ¶ 

Use the flat end of a spudger to pry both AirPort antenna connectors up off the AirPort card. Use the flat end of a spudger to pry both AirPort antenna connectors up off the AirPort card.

Step 5  ¶ 

  • Use the flat end of a spudger to pry both AirPort antenna connectors up off the AirPort card.

Step 6  ¶ 

Move both AirPort antennas toward the lower edge of your iMac, out of the way of the logic board.

Step 6  ¶ 

  • Move both AirPort antennas toward the lower edge of your iMac, out of the way of the logic board.

Step 7  ¶ 

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

Step 7  ¶ 

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

Step 8  ¶ 

Pull the camera cable connector straight up out of its socket on the logic board.

Step 8  ¶ 

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

Step 9  ¶ 

Pull the right speaker cable connector straight up out of its socket on the audio board.

Step 9  ¶ 

  • Pull the right speaker cable connector straight up out of its socket on the audio board.

Step 10  ¶ 

Remove the single 12 mm T10 Torx screw securing the right speaker to the rear case. Lift the right speaker up and out of the rear case, to clear the plastic mounting pins underneath it.

Step 10  ¶ 

  • Remove the single 12 mm T10 Torx screw securing the right speaker to the rear case.

  • Lift the right speaker up and out of the rear case, to clear the plastic mounting pins underneath it.

Step 11  ¶ 

Lift the optical drive fan connector straight up out of its socket on the logic board.

Step 11  ¶ 

  • Lift the optical drive fan connector straight up out of its socket on the logic board.

Step 12  ¶ 

Use the flat end of a spudger to pry the optical drive cable clip up off the optical drive connector. Lift the optical drive cable clip off the logic board.

Step 12  ¶ 

  • Use the flat end of a spudger to pry the optical drive cable clip up off the optical drive connector.

  • Lift the optical drive cable clip off the logic board.

  • During reinstallation, be sure the two raised bumps on the lower edge of the optical drive cable clip lock into the two voids on the underside of the optical drive socket.

Step 13  ¶ 

Push the optical drive cable connector toward the top of your iMac to disconnect it from the logic board.

Step 13  ¶ 

  • Push the optical drive cable connector toward the top of your iMac to disconnect it from the logic board.

Step 14  ¶ 

Lift the microphone cable connector straight up out of its socket on the audio board.

Step 14  ¶ 

  • Lift the microphone cable connector straight up out of its socket on the audio board.

  • During reinstallation, ensure that the mic cable runs between the ODD fan and the board support. If the cable runs on the wrong side of the support, the cable will be too short to plug in.

Step 15  ¶ 

If necessary, remove the piece of tape securing the thermal sensor and fan cables to the chassis.

Step 15  ¶ 

  • If necessary, remove the piece of tape securing the thermal sensor and fan cables to the chassis.

Step 16  ¶ 

Disconnect the following three cables from the logic board:

Step 16  ¶ 

  • Disconnect the following three cables from the logic board:

  • Hard drive thermal sensor.

  • Optical drive thermal sensor.

  • Hard drive fan.

  • When removing these connectors, it is helpful use your thumbnails to push the ears on either side of the connector toward the top of your iMac.

Step 17  ¶ 

Remove the following 13 screws securing the logic board to the rear case:

Step 17  ¶ 

  • Remove the following 13 screws securing the logic board to the rear case:

  • Six 7.2 mm coarse-thread T10 Torx.

  • Two 6.8 mm T8 Torx. When reinstalling these two screws, don't overtighten them, as the plastic tabs they hold down are thin and brittle, and can crack.

  • Three 7 mm fine-thread T10 Torx.

  • Two 24 mm T10 Torx.

Step 18  ¶ 

Lift the logic board out of the rear case, minding any cables that may get caught.

Step 18  ¶ 

  • Lift the logic board out of the rear case, minding any cables that may get caught.

  • If the front edge of the logic board, under the RAM sockets, won't pull up, it's sticking on the three plastic mounting pins in the rear housing under this edge. Use a spudger under the front edge of the RAM sockets to gently push up on this edge until it clears these mounting pins.