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PowerBook G4 Aluminum 15" 1.67 GHz Logic Board Replacement

Into brain surgery? This guide will show you how to remove your logic board.

Paso 1 Logic Board  ¶ 

Disconnect the 11 remaining cable connectors, removing tape as necessary.

Paso 1 Logic Board  ¶ 

  • Disconnect the 11 remaining cable connectors, removing tape as necessary.

  • Some red boxes include two cable connectors.

Paso 2  ¶ 

Remove the following 9 Phillips screws from the logic board:

Paso 2  ¶ 

  • Remove the following 9 Phillips screws from the logic board:

  • Three 6.5 mm in the upper left corner.

  • Six remaining 4.5 mm.

Paso 3  ¶ 

Lift up the left side of the logic board enough to disconnect the black and red power cable from the left side of the logic board.

Paso 3  ¶ 

  • Lift up the left side of the logic board enough to disconnect the black and red power cable from the left side of the logic board.

  • While the logic board is lifted, also disconnect the battery connector.

Paso 4  ¶ 

Remove the single black Phillips screw from the top of the left speaker housing. Remove the 4 mm hex nut from the left speaker housing.

Paso 4  ¶ 

  • Remove the single black Phillips screw from the top of the left speaker housing.

  • Remove the 4 mm hex nut from the left speaker housing.

  • Lift the left speaker housing from the lower case and disconnect the microphone/speaker connector.

Paso 5  ¶ 

Lift the left side of the logic board and disconnect the modem cable from the underside of the logic board.  A spudger is useful for freeing the connector from its adhesive.

Paso 5  ¶ 

  • Lift the left side of the logic board and disconnect the modem cable from the underside of the logic board. A spudger is useful for freeing the connector from its adhesive.

Paso 6  ¶ 

Very gently lift up the left side of the logic board.

Paso 6  ¶ 

  • Very gently lift up the left side of the logic board.

  • If the logic board does not immediately come free, it may be necessary to soften the thermal paste between the logic board and heat sink. You can soften the thermal compound using a hairdryer. Move the hairdryer back and forth between the two fans about one inch above the logic board for one minute. At this point, the logic board should now come free easily.

  • Lift the left edge of the board up to approximately a 30 degree angle (if you don't have your protractor handy, just lift until the DVI port clears the right hinge).

  • Once the logic board clears the ports, slide it out to the left.

Paso 7  ¶ 

Important! When you reinstall a logic board, you'll need to replace the thermal paste that goes between the processor on the logic board and the heat sink. Failure to remove the old paste and apply a new layer can cause the computer to overheat and sustain damage. The following steps refer to replacing the thermal paste between the processor and heat sink; follow these steps only when you are ready to place the logic board in the computer.

Paso 7  ¶ 

  • Important! When you reinstall a logic board, you'll need to replace the thermal paste that goes between the processor on the logic board and the heat sink. Failure to remove the old paste and apply a new layer can cause the computer to overheat and sustain damage. The following steps refer to replacing the thermal paste between the processor and heat sink; follow these steps only when you are ready to place the logic board in the computer.

  • Use a firm plastic edge to scrape the thermal material off the heat sink.

  • Apply a new layer of thermal paste to the heat sink.

  • The PC Card cage needs to be removed before installing your new logic board. The modem cable runs from the modem to the logic board, but connects to the modem underneath the PC Card Cage. After removing the PC card cage, you will need to disconnect the modem cable from the modem, plug it into the bottom of the logic board, and then plug it back into the modem. The PC Card cage can then be reinstalled by following the instructions backwards.