Introduction
Make sure to keep an accurate temperature reading by replacing your ambient temperature sensor.
What you need
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Loosen the single Phillips screw in the center of the access door.
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Remove the access door from your iMac.
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Remove the following 12 screws securing the front bezel to the rear case:
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Eight 13 mm T8 Torx.
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Four 25 mm T8 Torx.
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Pull the LCD temperature sensor connector straight up out of its socket on the logic board.
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If necessary, de-route the LCD temperature sensor cable from behind the logic board.
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Use the attached black tab to pull the data display cable connector away from the logic board.
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Remove the eight 12 mm T8 Torx screws securing the display panel to the rear case.
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Lift the display panel from its left edge and rotate it toward the right edge of the iMac.
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With the display panel still lifted, disconnect the four inverter cables.
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If you are replacing a hard drive and have an extra set of hands, it is possible to reach in and remove the drive without disconnecting anything but the LCD temp and display connector in the previous step with the LCD in its propped position.
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Disconnect the left speaker cable connector from the audio board by pulling it straight away from its socket.
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De-route the left speaker cable from the channel in the CPU fan. Continue completely de-routing the cable through the undersides of the IR board and heat sink.
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Disconnect the ambient temperature sensor cable by pulling its connector straight up off the logic board.
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If necessary, de-route the ambient temperature sensor cable from under the power button cables.
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Remove the single 28 mm T10 Torx screw securing the left speaker to the rear case.
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Lift the left speaker up and out of the rear case. Don't try to slide the speaker out, since there is a plastic mounting pin under the top end of the speaker housing that holds it in place.
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Use the flat end of a spudger to pry the ambient temperature sensor off the adhesive securing it to the left speaker.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.