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Installing iMac Intel 20" EMC 2266 Power Supply
- Author: Walter Galan
- Difficulty: Moderate
Power your iMac by replacing the power supply.
Sections
- Access Door 1 step
- Glass Panel 2 steps
- Front Bezel 3 steps
- Display Panel 4 steps
- Power Supply 4 steps
Tools
Tools (continued)
Relevant parts
- View:
- Paginated
- Full width

Edit Step 2
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Glass Panel
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The glass panel is fixed onto the front bezel with fourteen magnets around its perimeter.
Stick two suction cups to opposing 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 Step 3 ¶
Gently pull the glass panel straight up off the iMac.
The glass panel has several positioning pins around its perimeter. To avoid shearing these pins off the glass panel, be sure to only pull straight up during removal.
Be meticulous about cleaning the LCD and the inside face of the glass panel before reinstallation, as any fingerprints or dust trapped inside will be annoyingly visible when the display is on.

Edit Step 4
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Front Bezel
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Remove the following 12 screws securing the front bezel to the rear case:
Eight 13 mm T8 Torx.
Four 25 mm T8 Torx.
On the 24" iMac Intel Model A1225, the bottom center two screws are long (26mm), four on sides (two left, two right) are medium (18mm), and the remaining 6 (four top, two bottom corners) are short (14mm).

Edit Step 5 ¶
The front bezel is still attached to the iMac by the microphone cable.
Gently lift the front bezel from its top edge off the rear case.
Once the top edge of the front bezel has cleared the rear case, rotate the front bezel toward the stand and lift it off the rear case.
Rotate the front bezel away from the rest of the device and lay it above the top edge of the iMac.
When reinstalling the front bezel, start at the lower edge and make sure it is flush with the rear case before lowering the top edge onto the iMac.

Edit Step 10 ¶
With the display panel still lifted, disconnect the four inverter cables.
During reinstallation, place the four inverter cable connectors in voids between components attached to the rear panel so the display panel will sit flush on the edges of the rear case.
(combined into one plug in on the 24")

Edit Step 11
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Power Supply
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The next few steps bring your hands close to the exposed face of the power supply. Do not touch the face of the power supply to avoid a high voltage shock from the many large capacitors attached to the board.
Remove four T10 Torx screws securing the power supply to the rear case.
Grab the power supply by its edges and slightly lift it out of the rear case.

Edit Step 13 ¶
The single-wire connector near the upper left corner of the power supply is small and held very tightly in its socket, making it inherently difficult to remove. Be sure to pull only on the connector during removal, as pulling the cable will surely cause it to break.
Grab the connector between the nails on your thumb and index fingers and pull it toward the top of your iMac, disconnecting it from the power supply.
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