Imac G5 20 Model A1145 Speakers Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

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Sections

Access Door
2 steps
Front Bezel
7 steps
Lower EMI Shield
2 steps
IR Board
3 steps
AirPort/Bluetooth Board
5 steps
Speakers
5 steps

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BackiMac G5 20" Model A1145
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Introduction

What you need

Step 1

              Access Door

Orient the iMac face-side down on a table with the bottom edge facing yourself.
Remove the two Phillips screws securing the access door to the bottom grille of your iMac.
The screws are captive in the access door.
Before beginning the repair, unplug the computer and press and hold the power switch for 20-30 seconds, to discharge internal capacitors.

Orient the iMac face-side down on a table with the bottom edge facing yourself.

Remove the two Phillips screws securing the access door to the bottom grille of your iMac.

The screws are captive in the access door.

Before beginning the repair, unplug the computer and press and hold the power switch for 20-30 seconds, to discharge internal capacitors.

1024

Step 2

Remove the access door.

Remove the access door.

Step 3

              Front Bezel

Remove the three T8 Torx screws securing the front bezel to the rear case along the lower edge of the iMac.

Remove the three T8 Torx screws securing the front bezel to the rear case along the lower edge of the iMac.

Step 4

Turn the computer over.
Use your thumbs to press both RAM arms in past the front bezel for enough clearance to lift it off the rear case.

Turn the computer over.

Use your thumbs to press both RAM arms in past the front bezel for enough clearance to lift it off the rear case.

Step 5

While holding the RAM arms in with your thumbs, lift the lower edge of the front bezel enough to clear the rear case.

While holding the RAM arms in with your thumbs, lift the lower edge of the front bezel enough to clear the rear case.

Step 6

Re-orient your iMac so it sits upright on the stand.
Insert a plastic card up into the corner of the air vent slot near the top of the rear case.
Push the card toward the top of the iMac to release the front bezel latch.
Pull the front bezel away from the rear case.
Repeat this process for the other side of the front bezel.
It may be necessary to apply several layers of duct tape to the top of the access card to aid in releasing the latches.
If the bezel refuses to release, try pressing the lower edge back onto the rear case and repeat this opening process.
Alternatively, you can use a strong magnet by holding it to the front top left/right corner of the display. You will hear a snapping sound when the hatch is released.

Re-orient your iMac so it sits upright on the stand.

Insert a plastic card up into the corner of the air vent slot near the top of the rear case.

Push the card toward the top of the iMac to release the front bezel latch.

Pull the front bezel away from the rear case.

Repeat this process for the other side of the front bezel.

It may be necessary to apply several layers of duct tape to the top of the access card to aid in releasing the latches.

If the bezel refuses to release, try pressing the lower edge back onto the rear case and repeat this opening process.

Alternatively, you can use a strong magnet by holding it to the front top left/right corner of the display. You will hear a snapping sound when the hatch is released.

Step 7

Lay your iMac stand-side down on a table.
Lift the front bezel from its lower edge and rotate it away from the rest of your iMac, minding the RAM arms that may get caught.
Lay the front bezel above the rest of the iMac.

Lay your iMac stand-side down on a table.

Lift the front bezel from its lower edge and rotate it away from the rest of your iMac, minding the RAM arms that may get caught.

Lay the front bezel above the rest of the iMac.

Step 8

If necessary, remove the piece of kapton tape wrapped around the microphone and camera connectors.

If necessary, remove the piece of kapton tape wrapped around the microphone and camera connectors.

Step 9

Disconnect both the camera and microphone cables.

Disconnect both the camera and microphone cables.

Step 10

              Lower EMI Shield

Peel the lower EMI shield off the lower edge of the iMac and off the two vertical 4" sections on either side of the iMac.
It is not necessary to peel the lower EMI shield off the display.

Peel the lower EMI shield off the lower edge of the iMac and off the two vertical 4" sections on either side of the iMac.

It is not necessary to peel the lower EMI shield off the display.

Step 11

Tape the lower EMI shield up against the face of the display to keep it out of the way while you work.

Tape the lower EMI shield up against the face of the display to keep it out of the way while you work.

Step 12

              IR Board

Disconnect the IR board cable by pulling its connector toward the left edge of your iMac.

Disconnect the IR board cable by pulling its connector toward the left edge of your iMac.

Step 13

Remove the two T6 Torx screws securing the IR board to its metal bracket.
Hold the IR board as you remove the last screw, as it may fall.

Remove the two T6 Torx screws securing the IR board to its metal bracket.

Hold the IR board as you remove the last screw, as it may fall.

Step 14

Remove the IR board from your iMac.

Remove the IR board from your iMac.

Step 15

              AirPort/Bluetooth Board

Remove the single T10 Torx screw securing the right speaker to the rear case.

Remove the single T10 Torx screw securing the right speaker to the rear case.

Step 16

Lift the right speaker out of the rear case.
The cable between the speaker and its connector is short, so either hold the speaker or allow it to hang from the iMac for the next few steps.

Lift the right speaker out of the rear case.

The cable between the speaker and its connector is short, so either hold the speaker or allow it to hang from the iMac for the next few steps.

Step 17

Remove the two Phillips screws securing the AirPort/Bluetooth board to the logic board.
On some models, these may be T6 Torx screws.

Remove the two Phillips screws securing the AirPort/Bluetooth board to the logic board.

On some models, these may be T6 Torx screws.

Step 18

Use your finger to lift the AirPort/Bluetooth board from its left edge, disconnecting it from the logic board.
Lift the board from its left edge only.

Use your finger to lift the AirPort/Bluetooth board from its left edge, disconnecting it from the logic board.

Lift the board from its left edge only.

Step 19

Use the flat end of a spudger to pry both antenna connectors up off the AirPort/Bluetooth board.

Use the flat end of a spudger to pry both antenna connectors up off the AirPort/Bluetooth board.

Step 20

              Speakers

Use the tip of a spudger to push the ears on either side of the speaker connector toward the top edge of the iMac.
It will be necessary to work from alternating sides to “walk” the connector out of its socket.

Use the tip of a spudger to push the ears on either side of the speaker connector toward the top edge of the iMac.

It will be necessary to work from alternating sides to “walk” the connector out of its socket.

Step 21

Remove the two T6 Torx screws securing the IR board bracket to the aluminum heat sink on the logic board.
Remove the IR board bracket.

Remove the two T6 Torx screws securing the IR board bracket to the aluminum heat sink on the logic board.

Remove the IR board bracket.

Step 22

De-route the speaker cable along the face of the logic board.

De-route the speaker cable along the face of the logic board.

Step 23

Remove the single T10 Torx screw securing the left speaker to the rear case.
The screw for the left speaker is coarse-threaded.

Remove the single T10 Torx screw securing the left speaker to the rear case.

The screw for the left speaker is coarse-threaded.

Step 24

Lift the left speaker out of the rear case.
the left speaker cable may be routed under the hard drive fan cable and the power button cable. If so, disconnect both cables by pulling their connectors away from the face of the logic board.

Lift the left speaker out of the rear case.

the left speaker cable may be routed under the hard drive fan cable and the power button cable. If so, disconnect both cables by pulling their connectors away from the face of the logic board.

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

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                    Andrew Bookholt

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Introduction#

What you need#

Introduction

What you need