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iMac Intel 21.5" EMC 2389 IR Board Replacement

Written By: Andrew Bookholt (and one other contributor)
  • Comments: 58
  • Favorites: 1
  • Completions: 2

Difficulty

Moderate

Steps

12

Time Required

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Sections

3

Flags

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Introduction

Use this guide to replace the IR board.

  1. iMac Intel 21.5" EMC 2389 IR Board Replacement, Glass Panel: step 1, image 1 of 2 iMac Intel 21.5" EMC 2389 IR Board Replacement, Glass Panel: step 1, image 2 of 2
    Tool used on this step:
    Heavy-Duty Suction Cups (Pair)
    $14.99

    • 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.

    Edit

  2. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 2, image 1 of 2 iMac Intel 21.5" EMC 2389 IR Board Replacement: step 2, image 2 of 2

    • 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.

    Edit

  3. iMac Intel 21.5" EMC 2389 IR Board Replacement, Display: step 3, image 1 of 3 iMac Intel 21.5" EMC 2389 IR Board Replacement, Display: step 3, image 2 of 3 iMac Intel 21.5" EMC 2389 IR Board Replacement, Display: step 3, image 3 of 3

    • 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.

    Edit

  4. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 4, image 1 of 1

    • 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.

    Edit

  6. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 5, image 1 of 2 iMac Intel 21.5" EMC 2389 IR Board Replacement: step 5, image 2 of 2

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

    Edit

  7. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 6, image 1 of 2 iMac Intel 21.5" EMC 2389 IR Board Replacement: step 6, image 2 of 2

    • 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).

    Edit

  8. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 7, image 1 of 2 iMac Intel 21.5" EMC 2389 IR Board Replacement: step 7, image 2 of 2

    • The display data cable plug has a wire lock. Disengage the plug's lock by rotating the plastic tab so that it points upward. (It is not a pull tab.)

    • Pull the display data cable straight out of its socket on the logic board.

    • Do not lift up on the display data cable, as its socket is very fragile. Pull the cable parallel to the face of the logic board.

    Edit

  9. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 8, image 1 of 2 iMac Intel 21.5" EMC 2389 IR Board Replacement: step 8, image 2 of 2

    • Disconnect the LCD thermal sensor cable connector from its socket on the logic board.

    • If your fan is spinning full speed after completion, check this connection or the hard drive's thermal sensor cable.

    Edit

  10. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 9, image 1 of 1

    • Carefully pull the display toward the top edge of your iMac and lift it out of the outer case, minding any cables that may get caught.

    Edit

  11. iMac Intel 21.5" EMC 2389 IR Board Replacement, IR Board: step 10, image 1 of 1

    • Remove the piece of tape covering the IR board cable.

    Edit

  12. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 11, image 1 of 1

    • Use your thumbs to push the IR board connector toward the top edge of the iMac and out of its socket on the logic board.

    Edit

  13. iMac Intel 21.5" EMC 2389 IR Board Replacement: step 12, image 1 of 1

    • Pull the IR board out from behind the front face of the iMac's outer case.

    • Remove the IR board.

    Edit
Conclusion

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

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