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iMac Intel 17" Logic Board Replacement

  • Autor: Walter Galan
  • Tempo estimado: 2 - 4 horas
  • Dificuldade: Difícil

Like brain surgery? Use this guide to replace your logic board.

Note: The logic boards of the 1.83 Ghz models are not interchangeable with the 2.0 Ghz+ models. Several connectors are incompatible, including the power supply.

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Ferramentas

Passo 1 Logic Board  ¶ 

Pull the power button cable connector up off its socket on the logic board.

Passo 1 Logic Board  ¶ 

  • Pull the power button cable connector up off its socket on the logic board.

Passo 2  ¶ 

Disconnect the ambient light sensor by pulling its connector up off the socket on the logic board.

Passo 2  ¶ 

  • Disconnect the ambient light sensor by pulling its connector up off the socket on the logic board.

Passo 3  ¶ 

Disconnect the following four connectors by pulling them straight away from their sockets:

Passo 3  ¶ 

  • Disconnect the following four connectors by pulling them straight away from their sockets:

  • Camera cable.

  • Microphone cable.

  • Optical drive fan cable.

  • Hard drive fan cable.

Passo 4  ¶ 

Disconnect the optical drive thermal sensor cable from its socket on the logic board.

Passo 4  ¶ 

  • Disconnect the optical drive thermal sensor cable from its socket on the logic board.

Passo 5  ¶ 

Remove the two 7 mm fine thread T10 Torx screws securing the optical drive clip to the logic board.

Passo 5  ¶ 

  • Remove the two 7 mm fine thread T10 Torx screws securing the optical drive clip to the logic board.

  • Remove the optical drive clip.

Passo 6  ¶ 

Squeeze the two optical drive bracket ears together while pulling the drive up toward yourself. It may be helpful to hold the logic board down near the optical drive connector when pulling the drive toward yourself to avoid both components lifting together.

Passo 6  ¶ 

  • Squeeze the two optical drive bracket ears together while pulling the drive up toward yourself.

  • It may be helpful to hold the logic board down near the optical drive connector when pulling the drive toward yourself to avoid both components lifting together.

  • Pull the optical drive away from the side of the rear case and remove it from the iMac.

  • If your optical drive is particularly stubborn to remove, try the method used in the optical drive guide from the A1144 G5 iMac.

Passo 7  ¶ 

De-route the bundle of power supply cables from behind the hard drive bracket.

Passo 7  ¶ 

  • De-route the bundle of power supply cables from behind the hard drive bracket.

  • Some logic boards can be removed without taking out the hard drive.

Passo 8  ¶ 

Press the hard drive bracket down to free it from the rear case, then rotate the top of the drive toward yourself.

Passo 8  ¶ 

  • Press the hard drive bracket down to free it from the rear case, then rotate the top of the drive toward yourself.

  • Pressing the top of the hard drive bracket down to release it from the rear case requires a substantial amount of force, so we recommend laying your iMac stand-side down on a table to avoid knocking it over.

Passo 9  ¶ 

Lift the hard drive (with cables attached) straight up off its lower pins and remove it from the rear case.

Passo 9  ¶ 

  • Lift the hard drive (with cables attached) straight up off its lower pins and remove it from the rear case.

  • Be mindful of the hard drive cables, as they may catch on the logic board during removal.

Passo 10  ¶ 

Unplug the power supply cable bundle from the logic board by simultaneously depressing the locking mechanism (toward yourself) with a spudger and pulling the connector away from its socket.

Passo 10  ¶ 

  • Unplug the power supply cable bundle from the logic board by simultaneously depressing the locking mechanism (toward yourself) with a spudger and pulling the connector away from its socket.

  • The locking mechanism faces the rear case.

Passo 11  ¶ 

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

Passo 11  ¶ 

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

  • Three fine-thread 7 mm T10 Torx.

  • Three coarse-thread 7 mm T10 Torx.

Passo 12  ¶ 

Be sure to touch the chassis before proceeding to discharge any static.

Passo 12  ¶ 

  • Be sure to touch the chassis before proceeding to discharge any static.

  • Grab the logic board from its left edge and rotate it out from the rear case, using your other hand to press the RAM arms in enough to clear the rear case.

  • Be mindful of the ports attached to the rear of the logic board as they may stick to the rear case.

Passo 13  ¶ 

Pull the logic board straight out of the rear case, minding any cables that may get caught.

Passo 13  ¶ 

  • Pull the logic board straight out of the rear case, minding any cables that may get caught.

  • During reassembly of the logic board, pay attention to the position of the I/O connectors. When the board is back in the case, insert a USB or Thunderbolt cable into one of the connectors to align it perfectly.