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iBook G4 14" 1.42 GHz Logic Board Replacement

The motherboard includes all ports except the DC-In board.

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Stap 1 Logic Board  ¶ 

Remove the two Phillips screws securing the white plastic fingers of the I/O bezel to the metal framework.

Stap 1 Logic Board  ¶ 

  • Remove the two Phillips screws securing the white plastic fingers of the I/O bezel to the metal framework.

  • The longer screw goes into the longer finger, closer to the display.

Stap 2  ¶ 

Lift up the left side of the computer and slide the I/O bezel away.

Stap 2  ¶ 

  • Lift up the left side of the computer and slide the I/O bezel away.

Stap 3  ¶ 

Wedge a spudger between the RJ-11 board and the metal framework and slide the board to the left, off of the logic board.

Stap 3  ¶ 

  • Wedge a spudger between the RJ-11 board and the metal framework and slide the board to the left, off of the logic board.

Stap 4  ¶ 

Use the black plastic loop to disconnect the display data cable from the logic board.

Stap 4  ¶ 

  • Use the black plastic loop to disconnect the display data cable from the logic board.

Stap 5  ¶ 

Remove the four 4mm Phillips screws securing the hard drive to the metal framework. Carefully lift up the hard drive.

Stap 5  ¶ 

  • Remove the four 4mm Phillips screws securing the hard drive to the metal framework.

  • Carefully lift up the hard drive.

Stap 6  ¶ 

The cable you're about to remove is very fragile.

Stap 6  ¶ 

  • The cable you're about to remove is very fragile.

  • Disconnect the microphone cable at the front of the computer, between the left side of the hard drive enclosure and the metal framework.

Stap 7  ¶ 

Disconnect the Reed Switch board connector from the logic board.

Stap 7  ¶ 

  • Disconnect the Reed Switch board connector from the logic board.

Stap 8  ¶ 

This is a diagram of the ribbon clamp connector you will disconnect in the next step.

Stap 8  ¶ 

  • This is a diagram of the ribbon clamp connector you will disconnect in the next step.

  • 1) With your fingernails, grasp the locking bar on either side and pull up a small amount (about 1/16" or 2 mm).

  • 2) After disengaging the locking bar, slide the cable out of the connector.

Stap 9  ¶ 

Release the optical drive ribbon clamp as described above. Slide the optical drive ribbon out of its connector.

Stap 9  ¶ 

  • Release the optical drive ribbon clamp as described above. Slide the optical drive ribbon out of its connector.

Stap 10  ¶ 

Close the display and flip the computer over. Remove the two 5mm Phillips screws securing the battery connector to the metal framework.

Stap 10  ¶ 

  • Close the display and flip the computer over.

  • Remove the two 5mm Phillips screws securing the battery connector to the metal framework.

  • Lift the battery connector out of the metal framework and disconnect it from the logic board.

  • This connector requires considerable force to remove. We recommend wiggling the connector while applying tension to slowly "walk" the connector out of its socket.

Stap 11  ¶ 

Remove the following 8 screws:

Stap 11  ¶ 

  • Remove the following 8 screws:

  • Eight 3.5 mm Phillips.

  • Two 3.5 mm Phillips near the sleep light connector.

  • One 3.5 mm Phillips with a large head in the lower left corner.

  • One 4.5 mm Phillips.

  • From top to bottom, disconnect the inverter, fan, and sleep light cables from the logic board.

  • When replacing the logic board, make sure that the inverter cable is not pinned under the logic board.

  • When replacing the logic board, make sure that the inverter cable is not pinned under the logic board.

Stap 12  ¶ 

Lift the logic board up from the right side, and slide it up and out of the computer.

Stap 12  ¶ 

  • Lift the logic board up from the right side, and slide it up and out of the computer.

  • When replacing your logic board, be sure to transfer your old RAM chips to your new logic board.

  • Most 14" iBooks use thermally conductive pads rather than thermal paste to conduct heat from the processors to the heat sink. It is unlikely that these pads will fall off or become unusable during reinstallation. If so, be sure to apply a liberal amount of thermal paste to the surface of all processors before mounting the heat sink. This will avoid any damage from overheating.