Introduction

Use this guide to replace a blown power supply.

  1. Loosen the two Phillips screws securing the access door to your iMac.
    • Loosen the two Phillips screws securing the access door to your iMac.

    • Both screws remain captive within the access door.

    • Remove the access door.

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  2. Remove the following screws along the lower edge of your iMac:
    • Remove the following screws along the lower edge of your iMac:

      • Three 6 mm T8 Torx screws

      • One 8 mm T8 Torx screw

    My iMac had four 6mm T8 Torx screws (so not one 8mm screw)

    floor - Réponse

    My late 2006 iMac24 also has only 4, 6mm long T8 screws here.

    JC Gidley - Réponse

    • Lay your iMac stand-side down on a flat surface.

    • To lift the front bezel off the iMac, simultaneously:

      • Use your thumbs to press in the RAM arms and hold the iMac down.

      • Use your index fingers to pull the small bridge of material on the front bezel toward yourself.

      • Pull the front bezel up with your index fingers.

    • Once the small bridge of material has cleared the RAM arms, lift the front bezel by its lower edge just enough to clear the bottom edge of the rear case.

    My iMac did not have the "small bridge of material" mentioned, however the bezel just lifted off easily.

    maccentric - Réponse

    • Lift the front bezel off the rear case and rotate it away from the bottom edge of the iMac, minding the camera and microphone cables still attached to its upper edge.

    • The third picture shows the top front bezel brackets and their slots cut into the top edge of the iMac's rear case.

    • Do not completely remove the front bezel, as it is still attached by the camera/microphone cables.

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    • If necessary, remove the strip of tape covering the microphone cable connector.

    • The microphone connector is located near the inside of top edge of your iMac.

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    • Disconnect the microphone cable.

    • Disconnect the camera cable by pulling its connector away from the socket on the camera board.

    • The camera cable connector and socket are delicate and easily bent. Remove with caution.

    I found it easier not to remove the cables connecting camera and microphone, but rather to lean the plastic frame agains a pile of books so that it could rest almost vertical avoiding the need to disconnect those two sensitive cables.

    Stefano C - Réponse

    I agree that for a simple, quick battery change, don't risk damaging those delicate wires. Ignore Step 6 and instead of disconnecting the mic and camera wires, keep them in place and just have a friend hold the plastic frame up while you change the battery, or prop it up as mentioned by Stefano C above.

    WT Kwok - Réponse

    Make sure you double check the new logic board for the presence of the GPU assembly before installing. I stupidly installed a new board without moving the GPU from the old one first. So i guess you can say this guide worked for me twice. :)

    Trevor Kearsey - Réponse

    • Peel the two highlighted EMI shield tabs off the frame of the LCD.

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    • Remove the two T6 Torx screws securing the display data cable to the logic board.

    Wait, we need a T6 screwdriver as well?

    I purchased the T8 and T10 from your site as per the parts list above and now am here with an opened iMac on the dining room table unable to continue :/

    Stephen Alianiello - Réponse

    • Pull the black plastic tab attached to the display data cable connector to disconnect it from the logic board.

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    • Use your fingertips to pull both sides of the wide inverter cable connector out of its socket on the logic board.

    • De-route the inverter cable from its location next to the CPU fan.

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    • Before attempting this step, we recommend laying your iMac stand-side down on a table to avoid the display falling down.

    • Remove the eight T8 Torx screws securing the display assembly to the rear case.

    • It is helpful to use a thin magnetized screwdriver to remove these screws.

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    • Remove the display assembly from the iMac.

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    • Peel the strip of foam tape off the top edge of the CPU/GPU heat sink framework.

    • If necessary, transfer this tape to your new power supply once you have removed it from the iMac.

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    • Remove the following four screws:

      • Two 18 mm T10 Torx coarse thread screws

      • Two 14.3 mm T10 Torx fine thread screws

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    • Rotate the power supply out of the rear case from its left side.

    • Disconnect the DC-Out cable by depressing the lock on the connector while pulling it away from its socket on the power supply.

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    • Disconnect the AC-In cable by disconnecting its lock while separating the two halves of its connector.

    • Remove the power supply from the iMac.

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Conclusion

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

43 autre(s) ont terminé cette réparation.

I didn't do steps 8-10 and it still worked great.

dreamwires - Réponse

The guide does not state you need a T6 until you get to the part where you need to remove the display. Please fix that.

John Campbell - Réponse

Repair worked like a dream - took a couple of hours tops. Thanks!

adam - Réponse

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