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iMac G5 17" Model A1144 Logic Board Replacement

Use this guide to replace your logic board.

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手順 1 Logic Board  ¶ 

Disconnect the CPU fan connector from the logic board by pulling it straight up from its socket. Disconnect the CPU fan connector from the logic board by pulling it straight up from its socket.

手順 1 Logic Board  ¶ 

  • Disconnect the CPU fan connector from the logic board by pulling it straight up from its socket.

手順 2  ¶ 

Gently lift the CPU fan out of the rear case.

手順 2  ¶ 

  • Gently lift the CPU fan out of the rear case.

手順 3  ¶ 

Disconnect the following connectors from the logic board by pulling them straight up from their sockets.:

手順 3  ¶ 

  • Disconnect the following connectors from the logic board by pulling them straight up from their sockets.:

  • Ambient light sensor cable.

  • Power cable.

手順 4  ¶ 

Disconnect the hard drive data cable connector from the logic board by pulling it straight up from its socket.

手順 4  ¶ 

  • Disconnect the hard drive data cable connector from the logic board by pulling it straight up from its socket.

  • The SATA connector on most iMacs tends to stick in its socket on the logic board. If you are having trouble disconnecting the SATA cable, insert a metal spudger or any other thin tool into the gap between the SATA connector and its socket and twist the spudger's shaft to safely separate the two pieces.

手順 5  ¶ 

De-route the IR sensor cable from behind the AirPort Express card and set it aside.

手順 5  ¶ 

  • De-route the IR sensor cable from behind the AirPort Express card and set it aside.

手順 6  ¶ 

Remove two 5 mm T6 Torx screws securing the AirPort/Bluetooth board to the logic board. Lift the AirPort/Bluetooth board up from its left edge to separate it from its socket on the logic board.

手順 6  ¶ 

  • Remove two 5 mm T6 Torx screws securing the AirPort/Bluetooth board to the logic board.

  • Lift the AirPort/Bluetooth board up from its left edge to separate it from its socket on the logic board.

  • Lift the AirPort/Bluetooth board from its left edge only. Trying to lift from its right edge may break the connector off the logic board.

手順 7  ¶ 

Use the flat end of a spudger to pry both antenna cables up off the AirPort/Bluetooth board. This step need not be done.  Simply lay the card over the side.

手順 7  ¶ 

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

  • This step need not be done. Simply lay the card over the side.

手順 8  ¶ 

Disconnect the camera board cable connector from the logic board by pulling it straight away from its socket.

手順 8  ¶ 

  • Disconnect the camera board cable connector from the logic board by pulling it straight away from its socket.

手順 9  ¶ 

Disconnect the optical drive fan cable connector from the logic board by pulling it straight away from its socket.

手順 9  ¶ 

  • Disconnect the optical drive fan cable connector from the logic board by pulling it straight away from its socket.

手順 10  ¶ 

Remove the 7 mm T10 Torx screw securing the optical drive flex cable mounting bracket to the logic board. Remove the flex cable mounting bracket.

手順 10  ¶ 

  • Remove the 7 mm T10 Torx screw securing the optical drive flex cable mounting bracket to the logic board.

  • Remove the flex cable mounting bracket.

手順 11  ¶ 

Disconnect the optical drive flex cable from the logic board by pulling it straight up from its socket.

手順 11  ¶ 

  • Disconnect the optical drive flex cable from the logic board by pulling it straight up from its socket.

手順 12  ¶ 

De-route the hard drive data cable and tuck it under the optical drive to prevent the cable from interfering with future steps.

手順 12  ¶ 

  • De-route the hard drive data cable and tuck it under the optical drive to prevent the cable from interfering with future steps.

手順 13  ¶ 

Disconnect the hard drive fan connector from the logic board by pulling it straight away from its socket.

手順 13  ¶ 

  • Disconnect the hard drive fan connector from the logic board by pulling it straight away from its socket.

手順 14  ¶ 

Use the tip of a spudger to lift the hard drive and optical drive thermal sensor cables for clearance. Disconnect the optical drive temperature sensor connector from the logic board by pulling it straight away from its socket.

手順 14  ¶ 

  • Use the tip of a spudger to lift the hard drive and optical drive thermal sensor cables for clearance.

  • Disconnect the optical drive temperature sensor connector from the logic board by pulling it straight away from its socket.

手順 15  ¶ 

Disconnect the hard drive temperature sensor connector from the logic board by pulling it straight away from its socket.

手順 15  ¶ 

  • Disconnect the hard drive temperature sensor connector from the logic board by pulling it straight away from its socket.

手順 16  ¶ 

Remove the following screws securing the logic board to the rear case:

手順 16  ¶ 

  • Remove the following screws securing the logic board to the rear case:

  • Four fine threaded 7 mm T10 Torx screws.

  • Three coarse threaded 7 mm T10 Torx screws.

手順 17  ¶ 

Push the two RAM arms protruding from the access door inward and set them on the lower edge of the rear case to prevent them from getting caught when removing the logic board. Push the two RAM arms protruding from the access door inward and set them on the lower edge of the rear case to prevent them from getting caught when removing the logic board.

手順 17  ¶ 

  • Push the two RAM arms protruding from the access door inward and set them on the lower edge of the rear case to prevent them from getting caught when removing the logic board.

手順 18  ¶ 

Grab the logic board and pull it toward yourself slightly to separate the jacks from the rear case. Rotate the top of the logic board toward yourself slightly to gain access to the DC power cable connector.

手順 18  ¶ 

  • Grab the logic board and pull it toward yourself slightly to separate the jacks from the rear case.

  • Rotate the top of the logic board toward yourself slightly to gain access to the DC power cable connector.

  • Do not completely remove the logic board as the DC power cable connector is still connected to the underside of the board.

手順 19  ¶ 

While grasping the logic board with one hand, disconnect the DC power cable connector from the logic board by pulling it straight away from its socket.

手順 19  ¶ 

  • While grasping the logic board with one hand, disconnect the DC power cable connector from the logic board by pulling it straight away from its socket.

  • It may be helpful to wiggle the connector while pulling it.