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iMac G5 20" Model A1145 Heat Sinks Replacement

Use this guide to transfer the heat sinks to your new logic board.

手順 1 Heat Sinks  ¶ 

Remove the 6.1 mm T8 Torx screw from both sides of the heat sink nearest the logic board (two screws total). Remove the 6.1 mm T8 Torx screw from both sides of the heat sink nearest the logic board (two screws total).

手順 1 Heat Sinks  ¶ 

  • Remove the 6.1 mm T8 Torx screw from both sides of the heat sink nearest the logic board (two screws total).

手順 2  ¶ 

Remove the following ten screws: Eight 7.8 mm T8 Torx.

手順 2  ¶ 

  • Remove the following ten screws:

  • Eight 7.8 mm T8 Torx.

  • Two 6.1 mm T8 Torx.

  • If the eight screws around the processors refuse to unscrew, use a Phillips screwdriver to hold the lug from the one side of the board while you remove the Torx screw from the other side.

手順 3  ¶ 

Carefully lift both metal heat sink brackets off the logic board. Carefully lift both metal heat sink brackets off the logic board.

手順 3  ¶ 

  • Carefully lift both metal heat sink brackets off the logic board.

手順 4  ¶ 

Lift the logic board off the heat sinks.

手順 4  ¶ 

  • Lift the logic board off the heat sinks.

  • If a heat sink seems to be stuck, carefully pry it away from the logic board to separate the solidified thermal paste.

  • If you need to mount the heat sink back into the iMac, we have a thermal paste guide that makes replacing the thermal compound easy.

  • During reinstallation it is helpful to install the heat sinks one at a time, starting with the one closest to the logic board.