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Loosen the three Phillips screws securing the access door to the bottom edge of your iMac.
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Remove the access door from your iMac.
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Adhiera una ventosa en los 2 angulos superiores del panel de vidrio.
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Si sus ventosas no se pegan, limpie la superficie del vidrio y la goma de sus ventosas con un solvente liviano.
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Retira los ocho tornillos Torx T10 de 8 mm que sujetan la pantalla a la carcasa exterior.
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Remove the following four screws securing the power supply to the outer case:
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Two 22.2 mm fine-thread T10 Torx
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One 25 mm coarse-thread T10 Torx
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One 9 mm coarse-thread T10 Torx
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Carefully lift the power supply out of the outer case and rotate it to expose the cable lock as shown, minding the DC-Out cable still attaching it to the iMac.
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Disconnect the DC-In cable by depressing the locking mechanism on the connector while you pull the connector away from its socket on the power supply.
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Once the locking mechanism has cleared the socket, pull the DC-In connector away from the power supply.
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Disconnect the AC-In cable by depressing the locking mechanism while pulling the connector away from its socket.
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Remove the power supply from the outer case.
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Saca el conector del sensor térmico de la unidad óptica directamente de su zócalo en la placa lógica.
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Remove the single 13 mm T10 Torx screw securing the optical drive fan to the outer case.
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Pull the optical drive off the pins attached to the outer case.
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Pull the optical drive fan connector away from its socket on the logic board.
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Remove the optical drive fan from the iMac.
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Pull the left and right speaker connectors toward the right side of the iMac to disconnect them from the logic board.
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Disconnect the audio port cable by pulling its connector toward the right side of the iMac.
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Disconnect the AirPort cable by lifting its connector off the socket on the logic board.
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Disconnect the following cables by pulling their connectors toward the top edge of the iMac:
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Camera cable
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Hard drive thermal sensor
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Hard drive fan
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Microphone
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Disconnect the following cables by pulling their connectors toward the right edge of the iMac:
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Ambient temperature sensor
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Bluetooth cable
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Disconnect the CPU fan and power button by pulling their connectors toward the left edge of the iMac.
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If present, remove the piece of tape covering the IR sensor connector.
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Disconnect the IR sensor by pulling its connector toward the top edge of the iMac.
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Use your fingers to lift IR sensor assembly straight up out of the outer case.
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Remove the following six screws securing the logic board to the outer case:
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Three 25 mm T10 Torx
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Two 21.5 mm T10 Torx
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One 7 mm T10 Torx
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Remove the plastic ducts from the side of the LED driver board and the hard drive by pulling them away from the outer case.
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Carefully remove the aluminum tape attaching the GPU heat sink to the outer case.
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Carefully pull the logic board slightly away from the outer case.
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While holding the board away from the outer case, rotate the board back and forth while lifting up to release it from the outer case.
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Now that the lower edge of the board is free from the outer case, rotate the logic board toward yourself to expose its rear face.
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Carefully pull the optical drive connector away from its socket on the logic board.
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Disconnect the DC-In cable from the logic board by simultaneously depressing the locking lever on the connector while pulling it away from its socket.
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Remove the logic board from the outer case.
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If present, remove the pieces of clear tape securing the ambient temperature sensor cable and the left speaker cable to the rear case.
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Remove the two 13 mm T10 Torx screws securing the CPU fan to the outer case.
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Peel the cable retainer off the side of the CPU fan.
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Remove the CPU fan from the outer case, minding any cables that may get caught.
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De-route the left speaker cable from the clips securing it to the outer case.
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Carefully remove the left speaker and ambient temperature sensor cables from the CPU fan cable retainer.
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Use the flat end of a spudger to pry open the ambient temperature sensor retainer.
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Remove the ambient temperature sensor from the CPU fan.
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3 comentarios
My iMac’s fans are running constantly, even at idle. I believe the temperatures that are being reported in iStatMenus are inaccurate.
I ran Apple Diagnostics test and received this error:
4SNS/1/40000000: TAOP-42.398
This error apparently means the ambient air sensor in my 2011 iMac is bad.
Would removing the ambient air sensor as shown in this guide prevent the fans from spinning so fast all the time?
Look for a tool named “Mac Fan Control”, with that you can control the fan speeds manually or define which fan listens to which sensor.
I (or better our employes) would go crazy without that tool, since the most macs (over 60) in our company had a sensor fail sooner or later.
(i still can’t understand why such expensive hardware has so crappy components build in, some evil people say it is on purpose…)
Wolf -
I had to take my mid-2011 iMac to replace the GPU. Now the CPU fan is always max out and Temp Monitor tells me my “Airflow 1” sensor is not connected. Which connector did I miss when re-assembling the mac? Where would I see this connector on the motherboard?