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Inleiding

Prereq for removing logic board.

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  1. Push on each side of the left speaker cable connector with the tip of a spudger and gently walk it out of its socket. Push on each side of the left speaker cable connector with the tip of a spudger and gently walk it out of its socket.
    • Push on each side of the left speaker cable connector with the tip of a spudger and gently walk it out of its socket.

    A step is entirely missing here – removing the right speaker cable connection from the logic board and also removing the right speaker casing (all the pictures below show it already having been removed). You actually don't need to entirely remove the right speaker to get the logic board out but you will need to remove its screws and lift it slightly. And you will need to remove its plug from the motherboard but that's not hard and it looks identical to the left speaker plug/socket.

    Keir Thomas - Antwoord

  2. If necessary, use a pair of tweezers to gently peel the tape securing the left speaker cable to the SATA data/power cable. If necessary, use a pair of tweezers to gently peel the tape securing the left speaker cable to the SATA data/power cable.
    • If necessary, use a pair of tweezers to gently peel the tape securing the left speaker cable to the SATA data/power cable.

    Actually i didn't get why should i unstick the tape which gum up left speaker cable to the SATA data/power cable. It's gonna be hard to bond the tape again cause it looses the clue ability. I can definetely claim that there is no need to touch the tape.

    dv1977 - Antwoord

    I too can say that there was no reason to remove the tape.

    Jeffrey Gelinas -

    Agreed. I completed the repair without removing the tape.

    phil -

  3. De-route the left speaker cable by pulling it straight up out of the retaining clip in the back of the rear enclosure. In a similar fashion, lift the combo SATA data/power cable up out of the retaining clip. In a similar fashion, lift the combo SATA data/power cable up out of the retaining clip.
    • De-route the left speaker cable by pulling it straight up out of the retaining clip in the back of the rear enclosure.

    • In a similar fashion, lift the combo SATA data/power cable up out of the retaining clip.

  4. Use the flat edge of a spudger to flip up the metal retaining bracket on the iSight camera cable connector. Pull the iSight camera cable straight out of its socket on the logic board. Do not use excessive force. This is a delicate connector that can be easily damaged.
    • Use the flat edge of a spudger to flip up the metal retaining bracket on the iSight camera cable connector.

    • Pull the iSight camera cable straight out of its socket on the logic board.

    • Do not use excessive force. This is a delicate connector that can be easily damaged.

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  6. Use the flat edge of a spudger to disconnect each of the four antenna connectors from the AirPort/Bluetooth card. Note the original positions for each connector when reconnecting the cables. Note the original positions for each connector when reconnecting the cables.
    • Use the flat edge of a spudger to disconnect each of the four antenna connectors from the AirPort/Bluetooth card.

    • Note the original positions for each connector when reconnecting the cables.

    Be careful and tender here, otherwise you risk that the connectors brake

    Andreas - Antwoord

    Agreed, super easy to bend these and break them.

    jctracey - Antwoord

  7. Use the flat edge of a spudger to pry the headphone jack cable connector from its socket on the logic board. Push the cable slightly to the right to clear it for the removal of the logic board. Push the cable slightly to the right to clear it for the removal of the logic board.
    • Use the flat edge of a spudger to pry the headphone jack cable connector from its socket on the logic board.

    • Push the cable slightly to the right to clear it for the removal of the logic board.

  8. Remove the following screws securing the exhaust duct to the rear enclosure:
    • Remove the following screws securing the exhaust duct to the rear enclosure:

    • Two 6.3 mm T8 screws

    • Two 4.7 mm T8 screws

  9. Remove the four 7.2 mm T10 screws securing the logic board to the rear enclosure.
    • Remove the four 7.2 mm T10 screws securing the logic board to the rear enclosure.

    So a major problem for me here — my iMac (purchased 2018 ) has a solid circular fastener where the lower left T10 screw should be. So I think I’m dead in the water as far as getting the logic board off to put the new RAM in. I can’t see how people can insert the ram from behind without seeing it or being able to get two fingers to the tabs. I’m so frustrated with the design of this computer.

    jctracey - Antwoord

    That’s a new one on us! We’d love to see a photo. Any chance it’s a tamper-proof sticker hiding the head? You may also be able to turn it with a set of pliers if you can get a decent grip, just be careful not to bump any board components!

    Sam Goldheart - Antwoord

    That’s a new one on us! We’d love to see a photo. Any chance it’s a tamper-proof sticker hiding the head? You may also be able to turn it with a set of pliers if you can get a decent grip, just be careful not to bump any board components!

    Sam Goldheart - Antwoord

  10. Tilt the top of the logic board away from the rear enclosure. Lift the logic board straight up and out of the iMac. Be careful not to snag the board on any of the rear case's screw posts.
    • Tilt the top of the logic board away from the rear enclosure.

    • Lift the logic board straight up and out of the iMac.

    • Be careful not to snag the board on any of the rear case's screw posts.

    • The I/O boards at the bottom of the logic board will be the greatest challenge. It is recommended to pull gently to avoid any damage.

    If you have a helper (or if you're very coordinated and careful), you can very likely lift up the logic board far enough to replace both RAM modules without pulling the logic board all the way out. Just be careful what you touch, of course.

    phil - Antwoord

    This is the trickiest part of the whole operation. It took me a solid half hour to get the logic board out. I’m sure it would be easier a second time, because there’s not many delicate components around the USB/Internet sockets, so you can be a little more assertive with it than I felt comfortable doing.

    David Thompson - Antwoord

  11. When installing the logic board, take care to align the exterior I/O ports correctly. The logic board can sit crooked even when secured with all its screws. Use a USB flash drive and/or ethernet cable to ensure the logic board is seated correctly while you screw it in.
    • When installing the logic board, take care to align the exterior I/O ports correctly. The logic board can sit crooked even when secured with all its screws.

    • Use a USB flash drive and/or ethernet cable to ensure the logic board is seated correctly while you screw it in.

Conclusie

To reassemble your device, follow these instructions in reverse order.

Sam Goldheart

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