Installing iMac Intel 21.5" EMC 2308 Ambient Temperature Sensor

Replace a faulty ambient temperature sensor to maintain proper temperature feedback.

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Add Note Edit Step 1 — Access Door  ¶ 

  • Loosen the three Phillips screws securing the access door to the bottom edge of your iMac.

  • These screws will remain captive in the access door.

  • Remove the access door from your iMac.

  • During reassembly, fasten the access door loosely and align it with the pocket cut into the outer case of the iMac before fully tightening the screws.

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Add Note Edit Step 2 — Glass Panel  ¶ 

  • Before beginning, unplug your iMac and lay it on a soft surface as shown.

  • Stick a suction cup near each of the two top corners of the glass panel.

  • To attach the suction cups we sell, first position the suction cup with the movable handle parallel to the face of the glass panel. While lightly holding the suction cup against the glass, raise the movable handle until it is parallel with the other handle.

  • If your suction cups refuse to stick, try cleaning both the glass panel and the suction cup with a mild solvent.

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Add Note Edit Step 3  ¶ 

  • Gently lift the glass panel perpendicular to the face of the LCD enough to clear the steel mounting pins attached along the underside of the top edge of the glass panel.

  • Pull the glass panel away from the lower edge of the iMac and carefully set it aside.

  • During reinstallation, be sure to meticulously clean the inside of the glass panel and the face of the LCD as any dust or fingerprints trapped inside will be annoyingly visible when the machine is turned on.

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Add Note Edit Step 4 — Display  ¶ 

  • Remove the eight 8 mm T10 Torx screws securing the display to the outer case.

  • The last two pictures are detail shots of each side of the display.

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Add Note Edit Step 5  ¶ 

  • Slightly lift the top edge of the display out of the outer case.

  • Do not lift it too much. There are several cables attaching the display to the logic board.

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Add Note Edit Step 6  ¶ 

  • Pull the vertical sync ribbon cable out of its socket on the LED driver board near the top left corner of your iMac.

  • The vertical sync ribbon cable has a ZIF style end, but the socket has no lock or retaining flap. Simply pull the cable away from its socket toward the optical drive side of the iMac to disconnect it from the LED driver board.

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Add Note Edit Step 7  ¶ 

  • Rotate the display out of the outer case enough to disconnect the LED backlight power cable from the LED driver board.

  • Disconnect the LED backlight power cable by depressing the locking mechanism while pulling the connector away from its socket (toward the bottom edge of the iMac).

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Add Note Edit Step 8  ¶ 

  • Squeeze the two display data cable connector arms together to unlock it from its socket on the logic board.

  • Pull the display data cable connector away from its socket on the logic board.

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Required Tools

Spudger

$2.95 · 50+ In stock

Phillips #1 Screwdriver

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Metal Spudger

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T10 Torx Security Bit Screwdriver

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Heavy-duty Suction Cups (Pair)

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